Not recording the expected channel

#1
I was just trying my Dazzle USB TV-Stick (Pinnaccle 71e) and it seemed to work fine, however when I recorded a show it was displaying the channel I expected to record, but actually recorded another channel! HOW IS THAT EVEN POSSIBLE??? I always were under the impression that one tuner were only able to capture one channel at a time!

How can I make sure that won't happen next? Usually if I record a program, that's because I want to keep it!

#4
Okay, I get it - so all shared channels on that frequency are saved when you record as ts - But how do I demux these? Both ProjectX and PVAStrumento reports only 1 video stream, although I can see frames from both channels when I skip through it in ProjectX.