I would drop Audyysey and not use it at first, set up the system with the SPL meter and listen this way then run Audyysey and see which way you like better.

Certainly flip that center over and just try it at the front for awhile and see if you can notice a difference, if no difference then move it back. You can't see the wire while you are listening ;\)

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70