reply to Digiwhacked
Re: [HD] Non HD Channels missing It sounds like you have no box and are directly connected to your TV. You may have the non-HD's, but they may have odd channel numbers. Also, when Comcast goes digital, that means all of the expanded basic channels like Discovery, History, etc... will all be encrypted. You will only be able to get basic cable (broadcast and public access.) And that will probably not last long as the FCC has said cable companies can now encrypt EVERYTHING.
I have both a Sony and Samsung TV. It's just the way the Sony works. On my Samsung, when I've tested it directly (I normally have a DTA on that one), it's smart enough to know there is no '5' and will jump to 5.1 (if I wanted analog 5, I would use 5.0). On the Sony, it will try direct-tuning that channel's frequency if you don't type in a known number.