OK, so I just noticed 3 recordings taking place at the same time on my HR21-100! I was recording on one channel from 7:58 - 9:02, on that same channel from 8:58 - 10:02, and then on a separate channel from 7:59 - 9:01.... Between 8:58 and 9:01, there are actually 3 recordings taking place, granted 2 of them happen to be overlapping on the same channel. Is this normal/correct? I have not checked all of the recordings yet to verify that they worked, but this seems like a huge improvement over my older HR10-250 which could not record these overlaps forcing me to change my settings or not record something that I wanted in this situation. I am guessing that if I had overlapped something on the 2nd channel at the same time, I could have actually had 4 simultaneous recordings happening? Can anyone confirm this?