This happened to me yesterday as well when I booked Butcher Block. I thought initially there would just be a "hold" on my card, but I checked with the bank today and I had been charged $90 even though I have the premier package. I did online chat with Princess today and after 45 minutes of chatting and frustration, the person told me they cancelled the reservation and my card would be credited. Apparently there is a glitch and the person will "escalate" it to their managers since they could see that I did in fact have the premier package and shouldn't have been charged. Then they tried to upsell me on a future cruise. I told them I was still a bit upset over my 4 days notice of cancellation on the Feb 18th cruise I was originally booked on. They are just lucky I rebooked for May. I had to use my airline credits from my cancellation or I would have lost them... On a different note, the ship does look beautiful and I am happy for those embarking tomorrow.
