I just got an email from the TA. She said, "DONE! I'll send you a new confirmation today." And she didn't charge me anything extra so it's all good. Woohoo!!
Thanks to EVERYONE for their help and advice. I am very happy with my decision and I would have most likely agonized until I couldn't even get the cabin I wanted. We're now in C702 if anyone happens to be looking at deck plans (and gave up R502 for it). I absolutely will not be changing a thing from here on it. I do believe I'm set!