Actualy im going to stick my neck out and say your all wrong
It's to do with how active you are, because I have been on and Handymac has been infront of me
The reason you see your name first is because you had to have made the last action to see your name on the first page, That probably doesnt make much sense to you but trust me.
Also you will notice along with your name first, the list of people online goes in order of activity (again) and last on the list (towards right side) are usualy people who are 'afk' away from keyboard.
Hope this helps