I have a 622 connected to my HD, tv1. Tv2 is an SD set in another room. The box is in dual mode. When watching tv1 and the pre-set timer starts recording another show, everything is fine. The show records, I can watch something else or flip through the channels on tv1. However, if I turn on tv2 while the 622 is recording I am unable to change channels without stopping the recording. Is this the way it is supposed to operate? Do I need to adjust something? I was lead to believe the 622 operates the same as having two boxes. I believe this situation would not appear with a second box.