I can confirm this is the case. I originally booked the new dining card promo for All Star Music at 5am this morning then realized half hour later that I'd be better off at All Star Sports. I had already booked my park reservations and when I modified my reservation to Sports I lost all of the park reservations and had to book them again. ps I switched to Sports because while Music is a beautiful resort, it has a really deep footprint and standard rooms are usually booked in Country or Broadway at the very back. I usually have late flights in and dark early morning flights out and the pathways are poorly lit. At Sports, I can always ask even at late night check in for a room in Hoops or maybe Touch Down and save 5 mins on the walk to and from the bus every day plus have a much more secure lit path for those dark walks on my own. YMMV. But that has been my experience the past 15 yrs plus.