My mom just got an RCA RT2906 and every time she turns it on I have to go into SET UP and turn off the center speaker (because this is the only way I can get the rear speakers to have the main sound/voices). But when we power down, it goes back to center speaker ON. Neither the remote nor the receiver came with any detailed explanation on .... well, on much at all. The instructions are sub par, IMO. There are buttons on the remote and on the receiver that I can't figure out what they do (and they don't seem to have an effect when I press them). I'm sure there's a way to program the receiver to maintain CENTER OFF, but at this point it's a mystery. Any help is very appreciated.