Got off Azura yesterday, we had 3 cabins with 6 people too. We requested MDR second sitting table for 6, I checked twice with the travel agent this was correct and all the paperwork said so. On boarding we found our table was for 4 and the other two people were puton freedom dining. Reception were useless and told us to go to a restaurant in the morning. Turns out there is a dining desk set up at 1pm which sorted us all out. All fine