Sun Princess 5/16 - Why ALL the AB's (Aft!) still available??

[santamaria]

I asked this on the Princess site also, but thought I'd get response here. So many think the aft balconies are great (and I hope they are all right!! because I booked AA - my first cruise to Alaska and I'm already planning next year's). So almost all AA's are booked (one only available, plus one guarantee - that's another question I just don't understand, why guarantee for AA on Sun). Anyway, why are all AA's taken, and almost all AC's and NOT ONE AB?? Since the AB's are all aft on this ship, ?? Just wondering what other point I'm missing.