I thought that with the AM21, we would have the ability to record 2 channels (2 satellite or 1 satellite and 1 OTA) and still watch an OTA. Tried to do just that last night without success. Two different times I was recording 2 channels (TLC and an OTA, and later a local off D* and another OTA), and when I tried to change the channel I was prompted to cancel a recording. Misunderstanding on my part?