Did you turn on the option to create a thread and update the thread in the settings after you created the current quizzes? It looks like all the quiz thread ids in the database are set to 0. So when it goes to reply to the thread, it doesn't see one and creates a new thread instead.
Ok, well, can you at least tell me where I can get the latest version, please? I bought this from your site and the product license page shows 2.01, the zip file shows 2.01, but installed it says 2.00 and is out of date. thanks