Question about Anonymous Chat Age Group Selection

I am an adult, and I have registered as a listener and as a member within the same account.

When I am logged out, my sister, who is 16 years old, sometimes visits this site to chat anonymously, without an account.

Sometimes, after I have logged out of my account, when she tries to chat anonymously, it presents here with only one checkbox, asking her to indicate that she is 18 or older.

It seems that the website has somehow retained an indicator that I am an adult, even when I am logged out. This is preventing my sister from entering anonymously as a teenager and chatting with other teens.

I have tried clearing cookies and the cache, but the site still only presents the adult option for anonymous chat.

Any ideas on how to resolve this? Seems like a pretty serious bug in the website. Once a user logs out, the site should not get "stuck" on that user's age selection for anonymous chat.

Also: Has anyone else experienced this issue? Can someone else try to duplicate it? In other words, after you log out, can you enter anonymous chat in the other age group?

I have experienced this issue across multiple browsers and operating systems.