A couple of weeks ago, I stayed at the BWI airport Marriott for one night and then at a Courtyard in Las Vegas the following night. I had registered for the double point promotion and the double points should have kicked in with the Vegas stay. However, for some reason, that stay was posted before the BWI stay and I got the double points for the BWI stay despite staying there first. Not complaining though, as I got more points for the higher Marriott rate compared with the Courtyard rate.