[krustyreturns]

Sorry, I remember now, you need to turn off "use backend channel numbers...". If you have this on, xbmc tries to number channels using the backend values but xbmc doesn't do sub channels so you end up losing them all in the epg (confusing right?).

I just confirmed on my laptop that its what is causing your problem. After you turn it off, you need to reset the pvr database like scarecrow and dilligaf said, before you see changes.