Your In-Game Name: [eG]Bestkid
The way you found the bug: I started playing with my regular name Bestkid, then I got accepted to the eG Clan. So I had to change my name to [eG]Bestkid. I did it but as I logged off, I changed my SA-MP Nickname too and I re-logged in and all my stuff and achievement were gone? A Bug for the person who changes their name?
Screenshot of the bug