Because I have had several usernames on the older forums that I had merged ... So where you think you've been here longer, in essance, the date shown is from one of my "newer" accounts being merged into an "older" account
Hmmm - I'm not convinced - Ian is member #22.
Also I registered waaay back before 2004 (1999 - 2000 ???) but instead of my posts being merged - they were attributed to another member.