James,
I tried a few other types of HP quiz on your site. JCloze and JMatch are OK, but JMix has a problem.
The JMix problem is not connected with the Glossary/Filter settings. It is caused by something else.
You can fix the JMix problems if you download and install the latest version of QuizPort:
After uploading the new QuizPort scripts to your server, go to Site Administration -> Notifications to initiate the installation, as this is necessary to clear the QuizPort cache. After you have done that, the JMix quizzes will work fine.
regards
Gordon