I have dual PVR-250s, one hooked up to a set top box and one hooked up directly to a cable input. This was working before, but I wiped the installation and database and started over. Now mythtv tries to record the digital channels on the tuner, which results in recordings of snow. I tried to rectify this by adding a second video source, but now all the overlapping channels are listed twice in the program guide.

How do I fix this problem? I want mythtv to know that it can only record digital channels using the s-video input on card 1. Then I want it to record only non-digital channels on the tuner input on card 2. Any help is appreciated, thanks!