I caught that as well. I thought the Wish did Pirate Night on the 3rd night of 4 night cruises, so I was surprised to see theirs so early. I'm pretty sure the rotation is set up so you get to go to the three main dining rooms and repeat one. So their repeat will be 1923, and they said they had a reservation for that later on.
The other thing that I caught that didn't seem right is that they said that the MIckey and Minnie playspace in the Oceanears Club was something that was too 'baby' for Jackson and that they didn't think he would be much interested in it, but IIRC, he can't go to the OC anyway because it's for ages 3 and up. That playspace should be in the nursery - it's way too tame for 3+. Our kid is 22 months and it looks about his speed. But I'm curious if they'll try to take Jackson to OC later in the videos and find that he's not old enough. I felt for him with the Hero Zone part...
DCL doesn't seem to have a whole lot at all for kids under 3.