It has been reported and verified that there is a problem with updating the membership records on the ratings server.
This may lead to some problems with validating events, though I think it is mainly with affiliate and TD status, not member IDs.
If you have problems, please contact the ratings department for assistance (ratingsmgr@uschess.org.)
This problem has been reported to the development team and they’re looking in to the cause and a solution. Will keep you posted in this thread.