I don't think Terry can remove scores. But you shouldn't be able to score on your own quizzes - I just took one of mine and my score wasn't saved.
Are you sure your score was saved? I can't see the listings as it's been played more than 200 times.
Also, if you want to see the percentages, you can just click on 'edit' and they should be right next to the question number.
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"Without the darkness, how would we see the light?" ~ Tuvok
Editor for Television Category