I’d definitely check on the Swan and Dolphin thread. Having stayed there recently, I do know that you need to add everyone who is staying in the room when you link the confirmation number in
MDE. Our room was booked in my name and I had to add my mother’s name at the same time I linked in MDE. So unsure how that works when both rooms are in your name. I do know if you download the swan and dolphin app (not the Marriott app), you can easily text them and get a quick response. Curious how this turns out for you as we often book two rooms when we travel with our teen boys.