Glitches - Multi Tab Glitch

Today , as i  tried to log into my account , it said that i have another tab open. I kept trying to restart cp however , i still got the same notice.

The problem was , i couldn't find the second tab. I didn't have any other clubpenguin tabs open.  Maybe they are updating.

Have you ran into this glitch? What do you think? Tell me in a comment!

~Sledderboy