A similar thing happened to me, BD. Back in 2006 I decided to turn a 2 night stay into a 6 night stay at Pop. My first 2 nights I had reserved at the
AAA rate standard room. When I went to book my other nights, Pop was unavailable for one of the nights and I made a reservation at one of the All Stars for that night and then Pop preferred for two of the nights, and standard for one other!!!!
I kept tracking it on line and luckily a room at Pop opened up on the night I was supposed to be at All Stars. I really just wanted 6 nights standard, but ended up with 4 reservations! 2 nights standard AAA rate, one night preferred regular rate, two nights preferred regular rate and another night standard regular rate. And no, for some reason they could not combine the preferred reservations into one reservation.
So, I ended up with 6 nights at Pop, but on the phone they could not guarantee that I would not have to keep switching rooms!

I was told on the phone that I would have a better chance of staying in one room if I requested a King bed since not many people request them at Pop. Since I was solo, I did not care what type of bed I had.
When I checked in, the CM was able to give me the 6 nights in the standard room and said I would not have to physically move out of my room, but I would have to come down to the to the front desk on three mornings and check out and back in and get new keys!!!
I hope it all works out for you and you won't have to move!