Mac..are you signing in each time? I just had it "remember me".
I've noticed a few glitches with the site when you do repetitive type clicking about. For example, I went to try and check out each person's portfolio starting from the top ranked player down. After a while it just stopped working when I tried to view the person's holdings. It seemed to get slower and slower up to that point. I had to shut down my browser to get it working again.
Maybe it's just glitches on the site?