Doesn't do that for me dro!?? If it's still doing it you could try clearing your occ cookies and see if it still does it when you sign back in. it's certainly an odd one!
Also you could try running a scan to see if you have any spyware etc loaded on your machine. I use this, its a free download and it's updated regularly..
http://www.lavasoftusa.com/software/adaware/.
Hope it helps.