Just tried to book one night in early December for someone who already has a 2 night stay at a different Disney resort, that would overlap the single night. Once plans are finalized, the extra reservation would be cancelled. The Disney booking engine took me all the way to the payment page, but after entering valid credit card info, the page kept returning with an error (unknown). The page said to call, if issue continued. When calling in, the CM said it was because there already was a reservation for this party for a different resort for that date, and that double-booking was not allowed. Is that correct? I never ran into that before, assuming that the extra reservation were cancelled with plenty of advance notice.
Now, when I search in incognito mode, there no longer is availability for that resort/single night. I am guessing that
the original available room was sold to another guest, and that the system was lagging behind and showing space available, when in fact, it was not. Possible? The CM could see that single night, but would not book it, unless the 2 night stay were cancelled.