Online League: GM can't update to earlier game date after restoring
 

I am commish of an online league, and had to revert from 5/5 to 4/20 due to a corrupted file. I have now uploaded a clean league file, with the date 4/20, but at least one GM still gets the date of 5/5 after deleting his league file, loading a starter file, then updating in-game.

What could be causing this? Shouldn't his game be getting all its information from what I'm seeing in front of me and uploading?

Thanks for any suggestions.