Front desk CMs have access to our points and ressies for several reasons, not the least of which is folks that arrive at the resort last minute and try for a ressie, or need extra days on a weekend using points after MS is closed.
I had 10 points go into holding once that should not have (still don't know why, as there weren't any changes to the ressie), but MS fixed it.
Front Desk people are not trained on all the nuances of banking, borrowing, holding account, ect. The simply loook to see if you have points somewhere and apply to any any changes you may make. MS should later be able to go in a fix any point problems that happen.
As for what happened at SSR, it is anybody's guess. Mistakes, while frustrating, happen occasionally. People make mistakes, computers go down, when keys are reprinted the system burps. Man is not perfect, and neither are our machines. It just sounds like everything snowballed against the OP at the wrong time.
I would contact MS/Member satisfaction and relay my concerns, but I think this was a series of unfortunate events.