Last year a friend let us use her time share with Interval, and we actually got a spot in Old Key West. It was suppose to be a 2 bed, however, when we arrived, were given a studio because of a hhhhuuuggge mistake through Interval.
We were highly upset, and spent the night, but went through 4 different managers, and a miserable first day, until finally we were given the 2 bedroom by the last manager. Great room by the way!
My In laws were coming on the 3rd day, thus the reason for the 2 bed.
OKW was at about 80% capacity, so that may have been the initial problem, but as for the word "upgrades" or "invitational upgrade", no one seemed to know what I was talking about, and denied of hearing such a thing, despite what I've read.