Onkyo 605 Help

[PS3+HDDVD OWNER]

I've finally got my first bonafide Home Theater Setup and ready to rock and roll. But just when i thought life was good i noticed a couple of issues.

A) When i play my PS3 i am only getting sound from my front 3 speakers, no sound coming from my rears. My PS3 is set as the Game/Tv mode, but i haven't really done anything on the receiver as far as settings are concerned. Only ran audessy and let it be. While watching BD's, i get all 5 speakers working (no sub just yet). My receiver reads Game/Tv while playing Ps3, is there anyway to get it to display what kind of audio it is playing, or is that correct the way it is?

B) I just today noticed today that i think Circuit City sold me the wrong center channel speaker. I purchased what i thought to be a CS2 center channel for $63. The speaker i have however is definately not a CS2, i believe it to be a CSM


I'm not too concerned about the center channel right now, because i will scoop up a CS1 or CS2 within the next week or so. But only having my front 3 speakers working while playing PS3 is annoying. Can anyone help me out here? What do you guys have as your settings on your Onkyo 605??