Cassie, I have Firefox but changed over to Internet Explorer 9 and encountered the exact same problem.
I, too, went into my history and clicked on a link to a discussion group on which I posted recently--so it took me back to where I was already logged in.
Ahhhh, great minds think alike. LOL
Age 67, 5 feet tall
Highest weight ever 246 lbs. in the fall of 2010
FitDay starting weight 1/17/11 240 lbs.
Note: doctor's scale 4 lbs. lighter than my home scale. I go by my home scale weight
Weight 9/11/2013 234
Weight 12/7/13 same--234 lbs.