Membership date

Was perusing my profile and noticed that it shows my member since date of 2010, but I know I've been a member since before 2003. I assume it's because of the hacking incident, but was just curious if that's true because I do see people on here with dates like 2006, etc. I don't post a lot because I find there are a lot of people that are more expert than me, so even now I still show as a newbie, but I was just curious.Matt