Welcome to the Disney Parks Moms Panel, Jessica! I find that the online booking system for My Disney Experience refreshes in real time.
Whenever I want to book a single room or campsite, I will use
the online system, but if I need to adjust an already-made reservation, it may be easiest to call (407) 939-1936 and have a Cast Member assist. I know they can see the same thing you can as far as availability goes, but they may know of a room reservation that would be perfect for you, and have easier access to swap reservation locations or room bookings. I also use a personal travel agent from time to time, and she’s saved me gobs of money with slight adjustments and recommendations.
I hope you are able to secure exactly the right hotel room for you and your party. If there’s anything else we can do for you, just give a little whistle! And always let your conscience be your guide! ~ Lindsey P.