It is a pain with selfies. We had a lot of problems too. Finally got it all figured out and done but when we got to the port to check in they took our pictures again anyway.
Good luck with getting seating together. I hope it works out for you. We linked ours together 3 months befor the cruise as we had 4 cabins. We got 2 tables close to each other but not 1 table for all of us. The maitre'd d could do nothing.