Your "Fritz" (or whatever it is called) is receiving all the channels on each frequency. That's why it updates more than 1 channel for each channel that it scans. If you have a gigabit wired network, you could create an M3U with one channel per frequency (and replace pids=0,1,... with pids=all).
http://en.avm.de/products/fritzwlan/fritzwlan-repeater-dvb-c/