OP, you could also try the touring plans reservation finder if you want to move the ADR to a later time, just to be safe. They do the looking for you and will notify you by text or email if your desired time becomes available. You do have to be very quick to jump on it if you get a notification, as others are probably looking for the same thing, but I have had a great deal of success using it to get scarce ADRs. And it keeps you from having to constantly stalk the dining reservation site in hopes of finding something.