Quiz answer points do not sum correctly

The total points of my quiz and the total number of questions do not sum correctly. For example, in a recent test of 27 questions, the results column added up to a total of 241 points. But the results at the end of the quiz show 306 points and 35 questions. The points column showed 99.99 points. I suspect an initialization problem with the counters.

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Thank you for your help.

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