So are you hooking up the front 2 subs on 1 channel, and the rear 2 subs on channel 2 of the AES-1 ?
I know your pretty anal about the layout here Frank, but are the subs equidistant on the front wall and the back wall... I'm pretty sure that if this is the way you have them hooked up then - both the front or back will equate to a single line source to be EQ'd.
I would contact SVS on this, but don't forget to come back here and post, this is a good learning scenario for people. I stopped looking at the SVS unit knowing I would have 4 subs in the mix and it would not handle the various locations I have in my room - because of the strange layout.