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Thanks for the report

It's easiest to discuss specific problems, so let's go with your example of NPO 3 HD.

The log file shows that TV Server found it first on the correct frequency:
[2017-01-06 23:18:00,838] [Log ] [13    ] [INFO ] - dvbc: ScanVBC:tv: Freq:634750 ONID:-1 TSID:-1 SID:-1 PMT:0xFFFFFFFF FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam
...
[2017-01-06 23:18:01,022] [Log ] [13    ] [INFO ] - Scan: tuner locked:True signal:100 quality:100
[2017-01-06 23:18:06,026] [Log ] [13    ] [INFO ] - 0) 0x600 0x832 0x4BC9 0x7D0 NPO 1 HD type:19
[2017-01-06 23:18:06,026] [Log ] [13    ] [INFO ] - Found: DVBC:tv:Ziggo NPO 1 HD Freq:634750 ONID:1536 TSID:2098 SID:19401 PMT:0x7D0 FTA:True LCN:925 SymbolRate:6900 Modulation:Mod256Qam
[2017-01-06 23:18:06,026] [Log ] [13    ] [INFO ] - 1) 0x600 0x832 0x4BCA 0x8FC NPO 2 HD type:19
[2017-01-06 23:18:06,026] [Log ] [13    ] [INFO ] - Found: DVBC:tv:ZiggoL NPO 2 HD Freq:634750 ONID:1536 TSID:2098 SID:19402 PMT:0x8FC FTA:True LCN:926 SymbolRate:6900 Modulation:Mod256Qam
[2017-01-06 23:18:06,026] [Log ] [13    ] [INFO ] - 2) 0x600 0x832 0x4BCD 0xC80 NPO 3 HD type:19
[2017-01-06 23:18:06,026] [Log ] [13    ] [INFO ] - Found: DVBC:tv:Ziggo NPO 3 HD Freq:634750 ONID:1536 TSID:2098 SID:19405 PMT:0xC80 FTA:True LCN:10000 SymbolRate:6900 Modulation:Mod256Qam
[2017-01-06 23:18:06,026] [Log ] [13    ] [INFO ] - 3) 0x600 0x832 0x4BCF 0xED8 Comedy Central Extra type:1
[2017-01-06 23:18:06,042] [Log ] [13    ] [INFO ] - Found: DVBC:tv:Ziggo Comedy Central Extra Freq:634750 ONID:1536 TSID:2098 SID:19407 PMT:0xED8 FTA:False LCN:29 SymbolRate:6900 Modulation:Mod256Qam
[2017-01-06 23:18:06,042] [Log ] [13    ] [INFO ] - Scan Got 4 from 4 channels

...but then it was also found with identical parameters (ONID, TSID, SID) on the next frequency too:
[2017-01-06 23:18:06,163] [Log ] [13    ] [INFO ] - dvbc: ScanVBC:tv: Freq:642750 ONID:-1 TSID:-1 SID:-1 PMT:0xFFFFFFFF FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam
...
[2017-01-06 23:18:06,318] [Log ] [13    ] [INFO ] - Scan: tuner locked:True signal:100 quality:100
[2017-01-06 23:18:41,320] [Log ] [13    ] [INFO ] - 0) 0x600 0x832 0x4BC9 0x7D0 NPO 1 HD type:19
[2017-01-06 23:18:41,322] [Log ] [13    ] [INFO ] - Found: DVBC:tv:Ziggo NPO 1 HD Freq:642750 ONID:1536 TSID:2098 SID:19401 PMT:0x7D0 FTA:True LCN:925 SymbolRate:6900 Modulation:Mod256Qam
[2017-01-06 23:18:41,324] [Log ] [13    ] [INFO ] - 1) 0x600 0x832 0x4BCA 0x8FC NPO 2 HD type:19
[2017-01-06 23:18:41,326] [Log ] [13    ] [INFO ] - Found: DVBC:tv:ZiggoL NPO 2 HD Freq:642750 ONID:1536 TSID:2098 SID:19402 PMT:0x8FC FTA:True LCN:926 SymbolRate:6900 Modulation:Mod256Qam
[2017-01-06 23:18:41,328] [Log ] [13    ] [INFO ] - 2) 0x600 0x832 0x4BCD 0xC80 NPO 3 HD type:19
[2017-01-06 23:18:41,330] [Log ] [13    ] [INFO ] - Found: DVBC:tv:Ziggo NPO 3 HD Freq:642750 ONID:1536 TSID:2098 SID:19405 PMT:0xC80 FTA:True LCN:10000 SymbolRate:6900 Modulation:Mod256Qam
[2017-01-06 23:18:41,332] [Log ] [13    ] [INFO ] - 3) 0x600 0x832 0x4BCF 0xED8 Comedy Central Extra type:1
[2017-01-06 23:18:41,333] [Log ] [13    ] [INFO ] - Found: DVBC:tv:Ziggo Comedy Central Extra Freq:642750 ONID:1536 TSID:2098 SID:19407 PMT:0xED8 FTA:True LCN:29 SymbolRate:6900 Modulation:Mod256Qam
[2017-01-06 23:18:41,335] [Log ] [13    ] [INFO ] - 4) 0x600 0x833 0x4BDD 0x7D0 Spike type:1
[2017-01-06 23:18:41,337] [Log ] [13    ] [INFO ] - Found: DVBC:tv:Ziggo Spike Freq:642750 ONID:1536 TSID:2099 SID:19421 PMT:0x7D0 FTA:True LCN:927 SymbolRate:6900 Modulation:Mod256Qam
[2017-01-06 23:18:41,339] [Log ] [13    ] [INFO ] - 5) 0x600 0x833 0x4BDE 0x8FC RTL 8 HD type:19
[2017-01-06 23:18:41,341] [Log ] [13    ] [INFO ] - Found: DVBC:tv:Ziggo RTL 8 HD Freq:642750 ONID:1536 TSID:2099 SID:19422 PMT:0x8FC FTA:False LCN:934 SymbolRate:6900 Modulation:Mod256Qam
[2017-01-06 23:18:41,342] [Log ] [13    ] [INFO ] - 6) 0x600 0x833 0x4BE1 0xC80 Comedy Central Family type:1
[2017-01-06 23:18:41,344] [Log ] [13    ] [INFO ] - Found: DVBC:tv:Ziggo Comedy Central Family Freq:642750 ONID:1536 TSID:2099 SID:19425 PMT:0xC80 FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam
[2017-01-06 23:18:41,346] [Log ] [13    ] [INFO ] - 7) 0x600 0x833 0x4BE3 0xED8 RTL Lounge type:1
[2017-01-06 23:18:41,348] [Log ] [13    ] [INFO ] - Found: DVBC:tv:Ziggo RTL Lounge Freq:642750 ONID:1536 TSID:2099 SID:19427 PMT:0xED8 FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam
[2017-01-06 23:18:41,350] [Log ] [13    ] [INFO ] - 8) 0x600 0x833 0x4BE4 0x1004 TVE type:1
[2017-01-06 23:18:41,351] [Log ] [13    ] [INFO ] - Found: DVBC:tv:Ziggo TVE Freq:642750 ONID:1536 TSID:2099 SID:19428 PMT:0x1004 FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam
[2017-01-06 23:18:41,353] [Log ] [13    ] [INFO ] - 9) 0x600 0x833 0x4BE5 0x1130 Ziggo Sport Golf type:1
[2017-01-06 23:18:41,354] [Log ] [13    ] [INFO ] - Found: DVBC:tv:Ziggo Ziggo Sport Golf Freq:642750 ONID:1536 TSID:2099 SID:19429 PMT:0x1130 FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam
[2017-01-06 23:18:41,355] [Log ] [13    ] [INFO ] - Scan Got 10 from 10 channels

The only ways I could explain such a result is:
Ziggo error (eg. service description table for 634750 kHz also included in 642750 kHz transport stream).
Tuner error (eg. tuner supplies a few packets from the previously tuned transport stream shortly after tuning the new frequency, and by chance those few packets included the service description table).

I can understand why you'd find this strange. Co-incidentally, NPO 3 HD is a perfect example for explaining why this happens.

TV Server identifies DVB-C channels according to DVB specifications: by the combination of ONID + TSID + SID (or just ONID + SID if you enable the channel movement detection option). When TV Server first found NPO 3 HD (ONID = 1536, TSID = 2098, SID = 19405) at frequency 634750 kHz, there was no other channel with the same identifiers in the database. Therefore it was counted as new. Then when 642750 kHz was scanned, TV Server found the previous record (from 634750 kHz) with the same ONID + TSID + SID combination in the DB. Therefore the previous record was updated with the new frequency, and it was counted as an update.

<blockquote data-quote="mm1352000" data-source="post: 1208045" data-attributes="member: 82144">Thanks for the report <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />It's easiest to discuss specific problems, so let's go with your example of NPO 3 HD.The log file shows that TV Server found it first on the correct frequency:[2017-01-06 23:18:00,838] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - dvbc: Scan<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin&nbsp; &nbsp; :D" loading="lazy" data-shortname=":D" />VBC:tv:&nbsp; Freq:634750 ONID:-1 TSID:-1 SID:-1 PMT:0xFFFFFFFF FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam...[2017-01-06 23:18:01,022] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Scan: tuner locked:True signal:100 quality:100[2017-01-06 23:18:06,026] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - 0) 0x600 0x832 0x4BC9 0x7D0 NPO 1 HD type:19[2017-01-06 23:18:06,026] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Found: DVBC:tv:Ziggo NPO 1 HD Freq:634750 ONID:1536 TSID:2098 SID:19401 PMT:0x7D0 FTA:True LCN:925 SymbolRate:6900 Modulation:Mod256Qam[2017-01-06 23:18:06,026] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - 1) 0x600 0x832 0x4BCA 0x8FC NPO 2 HD type:19[2017-01-06 23:18:06,026] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Found: DVBC:tv:ZiggoL NPO 2 HD Freq:634750 ONID:1536 TSID:2098 SID:19402 PMT:0x8FC FTA:True LCN:926 SymbolRate:6900 Modulation:Mod256Qam[2017-01-06 23:18:06,026] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - 2) 0x600 0x832 0x4BCD 0xC80 NPO 3 HD type:19[2017-01-06 23:18:06,026] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Found: DVBC:tv:Ziggo NPO 3 HD Freq:634750 ONID:1536 TSID:2098 SID:19405 PMT:0xC80 FTA:True LCN:10000 SymbolRate:6900 Modulation:Mod256Qam[2017-01-06 23:18:06,026] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - 3) 0x600 0x832 0x4BCF 0xED8 Comedy Central Extra type:1[2017-01-06 23:18:06,042] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Found: DVBC:tv:Ziggo Comedy Central Extra Freq:634750 ONID:1536 TSID:2098 SID:19407 PMT:0xED8 FTA:False LCN:29 SymbolRate:6900 Modulation:Mod256Qam[2017-01-06 23:18:06,042] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Scan Got 4 from 4 channels...but then it was also found with identical parameters (ONID, TSID, SID) on the next frequency too:[2017-01-06 23:18:06,163] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - dvbc: Scan<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin&nbsp; &nbsp; :D" loading="lazy" data-shortname=":D" />VBC:tv:&nbsp; Freq:642750 ONID:-1 TSID:-1 SID:-1 PMT:0xFFFFFFFF FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam...[2017-01-06 23:18:06,318] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Scan: tuner locked:True signal:100 quality:100[2017-01-06 23:18:41,320] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - 0) 0x600 0x832 0x4BC9 0x7D0 NPO 1 HD type:19[2017-01-06 23:18:41,322] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Found: DVBC:tv:Ziggo NPO 1 HD Freq:642750 ONID:1536 TSID:2098 SID:19401 PMT:0x7D0 FTA:True LCN:925 SymbolRate:6900 Modulation:Mod256Qam[2017-01-06 23:18:41,324] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - 1) 0x600 0x832 0x4BCA 0x8FC NPO 2 HD type:19[2017-01-06 23:18:41,326] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Found: DVBC:tv:ZiggoL NPO 2 HD Freq:642750 ONID:1536 TSID:2098 SID:19402 PMT:0x8FC FTA:True LCN:926 SymbolRate:6900 Modulation:Mod256Qam[2017-01-06 23:18:41,328] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - 2) 0x600 0x832 0x4BCD 0xC80 NPO 3 HD type:19[2017-01-06 23:18:41,330] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Found: DVBC:tv:Ziggo NPO 3 HD Freq:642750 ONID:1536 TSID:2098 SID:19405 PMT:0xC80 FTA:True LCN:10000 SymbolRate:6900 Modulation:Mod256Qam[2017-01-06 23:18:41,332] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - 3) 0x600 0x832 0x4BCF 0xED8 Comedy Central Extra type:1[2017-01-06 23:18:41,333] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Found: DVBC:tv:Ziggo Comedy Central Extra Freq:642750 ONID:1536 TSID:2098 SID:19407 PMT:0xED8 FTA:True LCN:29 SymbolRate:6900 Modulation:Mod256Qam[2017-01-06 23:18:41,335] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - 4) 0x600 0x833 0x4BDD 0x7D0 Spike type:1[2017-01-06 23:18:41,337] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Found: DVBC:tv:Ziggo Spike Freq:642750 ONID:1536 TSID:2099 SID:19421 PMT:0x7D0 FTA:True LCN:927 SymbolRate:6900 Modulation:Mod256Qam[2017-01-06 23:18:41,339] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - 5) 0x600 0x833 0x4BDE 0x8FC RTL 8 HD type:19[2017-01-06 23:18:41,341] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Found: DVBC:tv:Ziggo RTL 8 HD Freq:642750 ONID:1536 TSID:2099 SID:19422 PMT:0x8FC FTA:False LCN:934 SymbolRate:6900 Modulation:Mod256Qam[2017-01-06 23:18:41,342] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - 6) 0x600 0x833 0x4BE1 0xC80 Comedy Central Family type:1[2017-01-06 23:18:41,344] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Found: DVBC:tv:Ziggo Comedy Central Family Freq:642750 ONID:1536 TSID:2099 SID:19425 PMT:0xC80 FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam[2017-01-06 23:18:41,346] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - 7) 0x600 0x833 0x4BE3 0xED8 RTL Lounge type:1[2017-01-06 23:18:41,348] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Found: DVBC:tv:Ziggo RTL Lounge Freq:642750 ONID:1536 TSID:2099 SID:19427 PMT:0xED8 FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam[2017-01-06 23:18:41,350] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - 8) 0x600 0x833 0x4BE4 0x1004 TVE type:1[2017-01-06 23:18:41,351] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Found: DVBC:tv:Ziggo TVE Freq:642750 ONID:1536 TSID:2099 SID:19428 PMT:0x1004 FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam[2017-01-06 23:18:41,353] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - 9) 0x600 0x833 0x4BE5 0x1130 Ziggo Sport Golf type:1[2017-01-06 23:18:41,354] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Found: DVBC:tv:Ziggo Ziggo Sport Golf Freq:642750 ONID:1536 TSID:2099 SID:19429 PMT:0x1130 FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam[2017-01-06 23:18:41,355] [Log&nbsp; &nbsp; ] [13&nbsp; &nbsp; &nbsp;&nbsp; ] [INFO ] - Scan Got 10 from 10 channelsThe only ways I could explain such a result is:<ol>
<li data-xf-list-type="ol">Ziggo error (eg. service description table for 634750 kHz also included in 642750 kHz transport stream).</li>
<li data-xf-list-type="ol">Tuner error (eg. tuner supplies a few packets from the previously tuned transport stream shortly after tuning the new frequency, and by chance those few packets included the service description table).</li>
</ol>I can understand why you'd find this strange. Co-incidentally, NPO 3 HD is a perfect example for explaining why this happens. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />TV Server identifies DVB-C channels according to DVB specifications: by the combination of ONID + TSID + SID (or just ONID + SID if you enable the channel movement detection option). When TV Server first found NPO 3 HD (ONID = 1536, TSID = 2098, SID = 19405) at frequency 634750 kHz, there was no other channel with the same identifiers in the database. Therefore it was counted as new. Then when 642750 kHz was scanned, TV Server found the previous record (from 634750 kHz) with the same ONID + TSID + SID combination in the DB. Therefore the previous record was updated with the new frequency, and it was counted as an update.</blockquote>

[QUOTE="mm1352000, post: 1208045, member: 82144"] Thanks for the report :) It's easiest to discuss specific problems, so let's go with your example of NPO 3 HD. The log file shows that TV Server found it first on the correct frequency: [2017-01-06 23:18:00,838] [Log ] [13 ] [INFO ] - dvbc: Scan:DVBC:tv: Freq:634750 ONID:-1 TSID:-1 SID:-1 PMT:0xFFFFFFFF FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam ... [2017-01-06 23:18:01,022] [Log ] [13 ] [INFO ] - Scan: tuner locked:True signal:100 quality:100 [2017-01-06 23:18:06,026] [Log ] [13 ] [INFO ] - 0) 0x600 0x832 0x4BC9 0x7D0 NPO 1 HD type:19 [2017-01-06 23:18:06,026] [Log ] [13 ] [INFO ] - Found: DVBC:tv:Ziggo NPO 1 HD Freq:634750 ONID:1536 TSID:2098 SID:19401 PMT:0x7D0 FTA:True LCN:925 SymbolRate:6900 Modulation:Mod256Qam [2017-01-06 23:18:06,026] [Log ] [13 ] [INFO ] - 1) 0x600 0x832 0x4BCA 0x8FC NPO 2 HD type:19 [2017-01-06 23:18:06,026] [Log ] [13 ] [INFO ] - Found: DVBC:tv:ZiggoL NPO 2 HD Freq:634750 ONID:1536 TSID:2098 SID:19402 PMT:0x8FC FTA:True LCN:926 SymbolRate:6900 Modulation:Mod256Qam [2017-01-06 23:18:06,026] [Log ] [13 ] [INFO ] - 2) 0x600 0x832 0x4BCD 0xC80 [B]NPO 3 HD[/B] type:19 [2017-01-06 23:18:06,026] [Log ] [13 ] [INFO ] - Found: DVBC:tv:Ziggo [B]NPO 3 HD[/B] Freq:634750 ONID:1536 TSID:2098 SID:19405 PMT:0xC80 FTA:True LCN:10000 SymbolRate:6900 Modulation:Mod256Qam [2017-01-06 23:18:06,026] [Log ] [13 ] [INFO ] - 3) 0x600 0x832 0x4BCF 0xED8 Comedy Central Extra type:1 [2017-01-06 23:18:06,042] [Log ] [13 ] [INFO ] - Found: DVBC:tv:Ziggo Comedy Central Extra Freq:634750 ONID:1536 TSID:2098 SID:19407 PMT:0xED8 FTA:False LCN:29 SymbolRate:6900 Modulation:Mod256Qam [2017-01-06 23:18:06,042] [Log ] [13 ] [INFO ] - Scan Got 4 from 4 channels ...but then it was also found [I]with identical parameters [/I](ONID, TSID, SID) on the next frequency too: [2017-01-06 23:18:06,163] [Log ] [13 ] [INFO ] - dvbc: Scan:DVBC:tv: Freq:642750 ONID:-1 TSID:-1 SID:-1 PMT:0xFFFFFFFF FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam ... [2017-01-06 23:18:06,318] [Log ] [13 ] [INFO ] - Scan: tuner locked:True signal:100 quality:100 [2017-01-06 23:18:41,320] [Log ] [13 ] [INFO ] - 0) 0x600 0x832 0x4BC9 0x7D0 NPO 1 HD type:19 [2017-01-06 23:18:41,322] [Log ] [13 ] [INFO ] - Found: DVBC:tv:Ziggo NPO 1 HD Freq:642750 ONID:1536 TSID:2098 SID:19401 PMT:0x7D0 FTA:True LCN:925 SymbolRate:6900 Modulation:Mod256Qam [2017-01-06 23:18:41,324] [Log ] [13 ] [INFO ] - 1) 0x600 0x832 0x4BCA 0x8FC NPO 2 HD type:19 [2017-01-06 23:18:41,326] [Log ] [13 ] [INFO ] - Found: DVBC:tv:ZiggoL NPO 2 HD Freq:642750 ONID:1536 TSID:2098 SID:19402 PMT:0x8FC FTA:True LCN:926 SymbolRate:6900 Modulation:Mod256Qam [2017-01-06 23:18:41,328] [Log ] [13 ] [INFO ] - 2) 0x600 0x832 0x4BCD 0xC80 [B]NPO 3 HD[/B] type:19 [2017-01-06 23:18:41,330] [Log ] [13 ] [INFO ] - Found: DVBC:tv:Ziggo [B]NPO 3 HD[/B] Freq:642750 ONID:1536 TSID:2098 SID:19405 PMT:0xC80 FTA:True LCN:10000 SymbolRate:6900 Modulation:Mod256Qam [2017-01-06 23:18:41,332] [Log ] [13 ] [INFO ] - 3) 0x600 0x832 0x4BCF 0xED8 Comedy Central Extra type:1 [2017-01-06 23:18:41,333] [Log ] [13 ] [INFO ] - Found: DVBC:tv:Ziggo Comedy Central Extra Freq:642750 ONID:1536 TSID:2098 SID:19407 PMT:0xED8 FTA:True LCN:29 SymbolRate:6900 Modulation:Mod256Qam [2017-01-06 23:18:41,335] [Log ] [13 ] [INFO ] - 4) 0x600 0x833 0x4BDD 0x7D0 Spike type:1 [2017-01-06 23:18:41,337] [Log ] [13 ] [INFO ] - Found: DVBC:tv:Ziggo Spike Freq:642750 ONID:1536 TSID:2099 SID:19421 PMT:0x7D0 FTA:True LCN:927 SymbolRate:6900 Modulation:Mod256Qam [2017-01-06 23:18:41,339] [Log ] [13 ] [INFO ] - 5) 0x600 0x833 0x4BDE 0x8FC RTL 8 HD type:19 [2017-01-06 23:18:41,341] [Log ] [13 ] [INFO ] - Found: DVBC:tv:Ziggo RTL 8 HD Freq:642750 ONID:1536 TSID:2099 SID:19422 PMT:0x8FC FTA:False LCN:934 SymbolRate:6900 Modulation:Mod256Qam [2017-01-06 23:18:41,342] [Log ] [13 ] [INFO ] - 6) 0x600 0x833 0x4BE1 0xC80 Comedy Central Family type:1 [2017-01-06 23:18:41,344] [Log ] [13 ] [INFO ] - Found: DVBC:tv:Ziggo Comedy Central Family Freq:642750 ONID:1536 TSID:2099 SID:19425 PMT:0xC80 FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam [2017-01-06 23:18:41,346] [Log ] [13 ] [INFO ] - 7) 0x600 0x833 0x4BE3 0xED8 RTL Lounge type:1 [2017-01-06 23:18:41,348] [Log ] [13 ] [INFO ] - Found: DVBC:tv:Ziggo RTL Lounge Freq:642750 ONID:1536 TSID:2099 SID:19427 PMT:0xED8 FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam [2017-01-06 23:18:41,350] [Log ] [13 ] [INFO ] - 8) 0x600 0x833 0x4BE4 0x1004 TVE type:1 [2017-01-06 23:18:41,351] [Log ] [13 ] [INFO ] - Found: DVBC:tv:Ziggo TVE Freq:642750 ONID:1536 TSID:2099 SID:19428 PMT:0x1004 FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam [2017-01-06 23:18:41,353] [Log ] [13 ] [INFO ] - 9) 0x600 0x833 0x4BE5 0x1130 Ziggo Sport Golf type:1 [2017-01-06 23:18:41,354] [Log ] [13 ] [INFO ] - Found: DVBC:tv:Ziggo Ziggo Sport Golf Freq:642750 ONID:1536 TSID:2099 SID:19429 PMT:0x1130 FTA:False LCN:10000 SymbolRate:6900 Modulation:Mod256Qam [2017-01-06 23:18:41,355] [Log ] [13 ] [INFO ] - Scan Got 10 from 10 channels The only ways I could explain such a result is: [LIST=1] [*]Ziggo error (eg. service description table for 634750 kHz also included in 642750 kHz transport stream). [*]Tuner error (eg. tuner supplies a few packets from the previously tuned transport stream shortly after tuning the new frequency, and by chance those few packets included the service description table). [/LIST] I can understand why you'd find this strange. Co-incidentally, NPO 3 HD is a perfect example for explaining why this happens. :) TV Server identifies DVB-C channels according to DVB specifications: by the combination of ONID + TSID + SID (or just ONID + SID if you enable the channel movement detection option). When TV Server first found NPO 3 HD (ONID = 1536, TSID = 2098, SID = 19405) at frequency 634750 kHz, there was no other channel with the same identifiers in the database. Therefore it was counted as new. Then when 642750 kHz was scanned, TV Server found the previous record (from 634750 kHz) with the same ONID + TSID + SID combination in the DB. Therefore the previous record was updated with the new frequency, and it was counted as an update. [/QUOTE]