Right now, my MathOverflow user page shows 12,878 votes, but the page with people's overall vote counts shows a mere 8674. I see similar discrepancies with other people's accounts. Is there some unorthodox enumeration method at work?
There are several places where we assume the Community User's creation date is when the site was created - one of those places is on the /users list page for the "all" filters.
For whatever reason*, Community's creation date was incorrect, having a value of
2010-11-10, instead of
2009-09-28, or when Anton's user was created. This would result in over a year of your votes not being aggregated.
I've updated Community to have the proper date, so everything should be fixed.
* I think it's because the old SE1.0 codebase didn't use this date for anything, so it wasn't imperative for it to be correct.