Bug confirmed. The problem is that the added 2015-badge has destroyed the value of the 2014 one in our database.
I will look into if we can recalculate it, or if we should restore a backup of that particular data. Regardless it will be fixed, and the causing bug is already fixed., so it won't happen next year..
UPDATE: Fixed, we could recalculate the data without using our backups. We had all the points and specifications intact. It was just that everyone got the 2015-badge for every year. We could then do the math on the old ones again.