We have the Sept. 17th Mardi Gras booked and wanted to add the cruise before for a B2B. I noticed something strange, the Sept. 10th cruise is only for 6 days and disembarks on Sept. 16th. We donât board until the 17th. Is the ship just empty for this one day? Looks like the cruise after us (9/24) is booked because it doesnât show up as an option.