wirthi,
Every client you install on machines is given a different member id#. For stats to go to one username instead of adding the ; after your name, the username and email address have to match exactly. I'm not quite sure if team number has to match as well.
Also, I would bet that when you reinstalled FAD on the computer, a new member id was assigned to it. That would make sense with your 3 computers and 4 memeber id#'s.
Hope this helps.