I was also amazed that 9215 was available. Someone must have cancelled and it opened up, or opened up due to a move up. In any case, from personal experience, the winde are definitely more of an issue on the forward hump cabins as to the aft hump cabins. I've stayed in both and do prefer the aft hump cabins. But in any case, I love the larger balconies.
Enjoy your cruise Charla!