I've actually had multiple rooms credit accidently before, but most of the time, you only get credit for the one. I agree it would be nice if they gave credit for multiple rooms, as long as you were physically staying in one of them. However, I don't think I'd let that affect my decision to stay at a particular property, since FPC isn't really a points based system. Of course, if I was 1 night's credit short of reaching a threshold that would earn an additional free night cert, then I guess it would make a difference. Most of the time, it wouldn't really make a difference to my benefits.