Conflicts when recording multiple channels on same frequency

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TV-Server Version: 3 rev 17587
MediaPortal Version: 0.2.3.0 svn 18032
MediaPortal Skin: BlueTwo wide
Windows Version: XP pro sp2
CPU Type: Pentium4 524 (P) HT 3.06 GHz
HDD: 140gb windows & MP drive, 298gb timeshift and movies drive, 931gb recorded TV drive
Memory: 512mb
Motherboard: Motherboard manufacturer's name: ECS RC410-M
Motherboard Chipset: Northbridge: ATI RC410 Southbridge: ATI IXP450
Motherboard Bios:
Video Card: Integrated graphics
Video Card Driver:
Sound Card: Integrated Realtek ALC 883 chipset
Sound Card AC3: Coaxial
Sound Card Driver:
1. TV Card: Hauppauge Win TV Nova S Plus
1. TV Card Type: DVB-S
1. TV Card Driver: 2.119.25023.0
2. TV Card: Hauppauge Win TV Nova S Plus
2. TV Card Type: DVB-S
2. TV Card Driver: 2.119.25023.0
3. TV Card: Hauppauge WinTV PVR 150MCE (Currently disabled)
3. TV Card Type: Analog
3. TV Card Driver: 2.0.48.25037
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec:
MPEG2 Audio Codec:
Satelite/CableTV Provider: Optus D1 160.0E
HTPC Case: HP a1520a
Cooling: Fan
Power Supply: HP
Remote: Hauppauge 45 button
TV: JVC 32inch CRT AV-32X4BA
TV - HTPC Connection: S-Video

Hi, I have two DVB-S cards in a single seat setup with tvserver, My issue is that since all New Zealand Freeview channels are on one of two frequencies (12483.00MHz LinearH and 12456.00MHz LinearH) I should in theory be able to record every channel at once however I am somtimes getting conflicts when I press record in MP. Since I have two cards and there are only two frequencies to tune to there should never be any conflicts. Any help would be much appreciated.
ThanksMediaPortalLogs.zip