I personally don't know the answer that question, so I would check with the CBR specific thread. I will add that it sounds like you are booking a 5 person room. I've heard that Disney has upgraded people from those rooms if there aren't 5 people on the reservation, by offering an upgrade which just means the room is more expensive. But I will say that was on the boards and the bad experiences are always heard louder, so might not happen really if at all. Though perhaps you might get a better response on the CBR thread too related to that also.