I don't recall your stating what cruise line you are with but here's what happened to us last year on Carnival Triumph. We had 2 inside cabins booked in midship side by side. We got to the pier and gave our luggage to the porters 1st. Then we proceeded to embark. When we turned in our paperwork we were advised 1 cabin was upgraded to outside view at the front of the ship last floor. I inquired about the luggage not getting to us and we were assured that they know we got a new room and we would get our luggage. Guess where our luggage went? If you guessed to our original cabin assignment you were correct! It's a good thing we checked back. In other words they don't know so understand the process and be prepared.