Last night I was watching a recording with my two satellite channels on 105 and 1940( or whatever number HBO HD is). When I finished the recording, and deleted it, and went to rewind channel 105 to the beginning of "The 4400", it would not rewind. I did a swap and HBO rewound just fine, and later, after "Entourage", when I went back to 105, it rewound just fine. Does watching a recording act as being on a channel, or is this some kind of fluke occurrence? Also, what is the R button for that is above the swap button?