One of the faculty members at my institution is having an issue with one of her quizzes: she set up the quiz to be 5 questions worth 1 mark each, so students' scores should be out of 5. After some students had taken the quiz, the faculty member noticed the scores were ranging up to 15/5. The teacher then went and disabled CBM (changing to "Deferred feedback" instead of the erroneous "Deferred feedback with CBM"). The scores for students attempting the quiz after CBM was disabled are showing up properly (e.g. 3/5, 5/5, etc.) but the grades for students who attempted the quiz while CBM was enabled are still showing up incorrectly (e.g. 12/5, 15/5, etc.).
How can I/she go about fixing the scores for the students that took the quiz when CBM was enabled? I have tried everything I could think of (except manual regrading of questions/attempts).
We are running Moodle 2.6.1.