Almost all the questionnaires in my platform have 10 questions and 10 points. When qualifying each attempt the score is not correct: if you guesses right 9 questions, for example, it seems to calculate the grades as follows: 9/11 *10, that is to say it seems that it takes a question more than those that there is.
Here you have two pictures I think you can see better what i´m saying (i hope).
Yes, in database tables the score doesn´t turn to zero, but the new score is done over 1 point not over ten points, so in database appears 0.67, 0.33, etc. but in the web appears like 0. It´s a little bit strange, because in some quizzes your solution works but in most it doesn´t.
For example, I have a quiz of the type multiquestion with one question and some posible answers that although I put ten points to it in the quiz, always appears as 1 point. In other similar quizzes, however, it works fine. But in those that works, the regrade button always regrades over 1 point, not over ten points (except in one case 
).
In quizzes with ten questions, the "regrade" button regrades all attempts over 1 points too.
I´m having a lot of mails of the students with this question, so yes, I need help with this 
.
Cheers