In Feb 2004 we had a split stay between ASMo and ASMu. We were in ASMo first for 4 days then had to transfer to Music for the final six days.
When we booked into ASMo we stated that we had the second reservation at Music but would like to stay for our whole trip at the one resort.
We were advised by the Supervisor (CM could not do anything and had to go see Supervisor) that he would take care of us.
It took three days and lots of confusion but the supervisor (Barry) did get the reservation from Music switched over to Movies. Part of the confusion was getting the same rate for the extra days at Movies, that took an extra day on its own. There was also a problem with the deposit on the Music reservation, somehow the deposit money got lost in the internal swapover and that took three days to figure out.
But it all worked out, and because of all the confusion over the move Disney compted us for a Dinner at the Coral Reef.
So in answer to your question it is possible, but you have to be right on top of people to make sure that everything gets done and your deposits are allocated to the correct rooms.
By the way because of this split stay I have made sure that I can stay in one resort for my full vacation.
