There are absolutely no previews stored in my db so it can't be that.
Wouldn't it actually be question_states though that is used to generate these numbers and possibly in particular the event field? And if so what would it be looking for in that field?
Before when I was using 1.6 there was a bug at the time that required I go in and manually change this field from time to time when students would accidentally wipe out their answers in order to restore them.
Quiz
What is an "ungraded attempt"? The numbers don't add up
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