Hey there, hi there, Christina!
Sometimes, when trying to modify an existing resort reservation online, Stitch comes in and messes things up.
I would suggest to call 407-939-1936 and have a Cast Member add the additional night to your existing reservation. They may be able to add on a night at your current resort. But if nothing is available, they will be more than happy to add an additional night at one of the other
Walt Disney World resorts. If the additional night is made for another resort, you can take your luggage to the next resort, or you can stop by Bell Services at your first resort and request for them to transfer your luggage to the next resort for your last night. Also,
Disney's Magical Express can pick you up from the resort that you will be staying at for your last night. Call 866-599-0951 and ask the Cast Member to modify your current Magical Express reservation to reflect your resort reservation change. I would also ask the Cast Member who adds your additional resort reservation about updating your Magical Express reservation. They may be able to assist you with that, as well.
Have a blast this summer at Walt Disney World. Please stop by and see us again soon. We're here to help you with FastPass+, special events, and things to do at
Disney Springs too.
Happy planning,
Korliss