I went and had a look. No question there's been a mistake. But it's not in the ship's review. It's located in the company overview, which wouldn't be changed very often at all.
So, not that surprising that if an error was made, it wasn't picked up before it was pointed out.
Mistakes occur. I recall seeing a show on TV, showing goofs in various movies. Think it was Ben Hur, or perhaps some other historical production, and one of the actors was wearing a watch.
BTW...I also love the Millenium Class ships. Can't wait to board the Summit next week, but I also really like nice open atriums. One of the features of Carnival and RCI ships that appeal to me.