Here's the problem:

1. I click my name, and choose guest from the drop down menu
2. I am switched to a guest session
3. I log out of the guest session
4. I am back in my original session, I click my name, the drop down menu now has two options (along with the others) "Guest" and "Guest session".

Why is this?

Many thanks

EDIT: Obviously, this is in intrepid