Previously, the number of games played was associated with your registration key. Meaning, the number of games played with this registration key determines your belt.
Since version 3.0 , its associated with the account in the forum. Meaning, the number of games played with this account, determines your belt.
Therefore, if you previously changed your account name while playing (or shared your key), the number of games played that you have now is be the amount of games that you played with this account, and that determines the belt that you have now.
Zinkon - we're fixing the problem that you reported.