OK, need some help here. I have a Motorla DVR with digital audio out from Comcast. Last night I was surfing and landed on HBO - Rome. I noticed my Yammy 2500 receiver lit up with all 5 channels indicating 5.1 surround sound was broadcast. Switched to next channel (Sean Connery movie, name escapes me) and it was 5.1 too. I then noticed the rest of the HBO channels were not in 5.1 on my receiver. I also watched world series, which I thought was broadcast in 5.1, but again not showing that way on my receiver. Don't get me wrong, the digital out sounds good, does digital cable not broadcast in 5.1 all the time like with the major networks or is my setup messed up? Or am I missing something?