I called today, the group representative who answered the phone told me. Oh, they certainly can' be changed, but we have to send it over to the resolution desk. then the resolution desk tells me that you cannot change both people, only one, even though I have changed both people multiple times since I booked the cruise over 18 months ago period so I just kept calling and talking to different people. And finally, the last representative I spoke too said no problem I can do that for you And he changed both rooms for me!?!?