Yeah, this happens if the game decides to load an old macro file that you have laying around in the folders. Happened to me when i logged on one of the accounts on a different computer once.

To get my macros back, I copied the macros file from one of the other accounts to get the bulk of it, then edited some that were account specific to make them the right version, and had to remake some that i'd had on only the account that lost its macros.