Right, that I understand. It's just confusing that it doesn't SAY what type of decoding it is using. Just "Dolby Digital".

I imagine from what you're saying that if I switch it to stereo during a DD 2.0 broadcast, then tune to a 5.1 station, then tune back to a 2.0 station, it will be broadcast in stereo. I'll try that out. Thanks!

Edit: Actually, that didn't work. Here's what happened. If I change the cable to a DD 2.0 channel, and switch to "stereo", it's 2 channel. Then when I switch back to a DD 5.1 channel, it still says "stereo"! It doesn't automatically go into DD mode, and just broadcasts left and right channels. But if I go to a DD 2.0 broadcast and choose PLII-C, then switch back to a DD 5.1 broadcast, the display says "dolby digital" and I get 5.1 sound. Then if I switch back to a 2.0 channel the display says "dolby digital", but despite there only being 2 channels of sound it's decoding it like a PLII-C (I imagine), broadcast.

That is, it does seem to be remembering, but only between PL and Dolby Digital, not between "stereo" and Dolby Digital. And it only just started doing this.

Seems odd.