You know the "who's online" is not perfect. I have never figured out how to get out from our office without needing to log in twice. When I log in from home all is well. At the office I log in, then log in again and it says welcome, and reveals any PM's I have, and it lets me post, but does not show me as online, only as a guest, (or maybe a spider?)
On the way home from Branson we determined that my son Brandon has some issues about spiders!