If I remember correctly, when we booked our first two DCL cruises, we picked a deck and a room and that was the end of it. Now, when I look at the DCL website, and it seems all Cruise lines that I have looked at do it the same way, you can book a 10a, 10b, 10c, 11a, 11b, the list goes on and on. When I look at the descriptions, most of them appear to be the same, even on different decks. Why do the cruise lines do this? When I plan a cruise, I look at the deck plans and pick a room and a deck, then call my TA. She then tells me that the room is a cat this or a cat that. Which is fine, but still meaningless to me??? . At one point, she even told me that one room we looked at was more than the other because it was a different cat, but from everything I could see online and from the description, the rooms were identical. What am I missing here?