I checked and my SPG number is 11 digits. But I then checked my old Westin Premier # (one of the precursors to SPG) and it seems my SPG number is the same. I'm wondering for those with a 9 digit SPG number if you were a member of the old Sheraton program (pre-SPG) or maybe even an earlier member of Westin Premier and maybe they just kept that number as well? And note this could be why a few folks might have had an SPG number that conflicts with an existing MR #. Marriott could have been told that all SPG
#s were 11 digits (i.e. no conflicts with MR #) and no one thought that there might be a few SPG members with 9 digits (possibly from a legacy system like the old Sheraton program) until now. And so they have to fix that problem before they merge on the 18th.
Just a thought.