No, I was wrong: it's not the scores going down: it's the number of "mistakes" left to be found. Except that they're not "mistakes" but "answers"in for example your Restaurant Reviews exercise.
I've sent you an email with screenshots to show what's happening.
I've also sent you the settings I use for "traditional" Find the mistake and Correct the mistake exercises. The standard JClose feedback messages don't fit what happens in Find-It.
You'll have to experiment to see what fits your Quiz exercise.
PS I'd be happy to send my Find-It settings to anyone that's interested.