Ow, I didn't even know there were 'special' guests I thought you turned from a guest into a member? But I didn't really pay a lot of attention to it, so I can't help ya. It has probably something to do with your amount of posts.
welcome..actualy i think ya become a member at 75 or so..&..i think at some point you can change it to anything you want..but not sure
I don't think there is a special guest status here at the forums. It's guest..to member..to senior member. As far as I know...you hit member status at 100 posts,but some people have said they reach it before 100. Then to become a senior member you need to be here 100 days,have 15 rep. points,and atleast a 1000 post count.