mgillespie05
You are not missing anything it,s very logical and it,s exaclty working the way it should! the thing is that those middle speakers u are talking about , they are not ment to be your middle speakers there,s no such thing as that , those are your side-surround speakers in a 7.1 system ,and they should be placed on side wall's with the speakers facing toward your ears or a couple of inch's behaind the ears for optimal result.
Just to piont it out, A 5.1 multichannel track it,s consisted of: L. FRONT/ CENTER / R. FRONT/ L. SIDE-SURROUND/ R. SIDE-SURROUND/ SUB.
But many people have been using them as Rear/Back surround channel in a 5.1 system ,and that by placing them behind the listner.
7.1 multichannel track it add 2 extra channel L. BACK-SURROUND & R. BACK-SURROUND
With today technology in amp. u can easly upconvert a 5.1 track to 7.1 it,s all there if u want! but personaly speaking i never liked the upconverting thing.
Goodluck!