Originally Posted by
cfischer
that's the way to do it to avoid the problem the OP is likely posting about. Post midnight arrivals somehow mess up the night count unless you check in online before you arrive.
It can be fixed via Marriott customer care, but it is a bit of a pain.
Online checkin does not check you in. I have done this and still required several communications to get my nights fixed after a 4.30 am arrival.