This happened to us as well (I posted a topic titles "disney dilemma" if you want to search for it)
We made our reservations a year ahead of time and were still given the boot. With the help of a great TA and a great CM, we were upgraded from a standard room at BC to a concierge room, lagoon view, at Poly!
Wasn't quit as painful knowing i was "moving on up, to the east side"!
Hope your able to manage a good deal as well!
Good luck!