We had a student take a quiz and receive a score of 7 points. However, his actual score was 15(out of 20 points). When we reviewed the quiz we saw that the questions were graded correctly but not totaling correctly. The first 10 questions graded and recorded correctly. The second 10 questions did not. Each of the incorrectly scored questions had a grade response history while the questions that scored correctly did not. This quiz was NOT an Adaptive Quiz; it had a time limit of 25 minutes, 2 attempts allowed and 10 minutes between attempts. The questions were all pulled randomly from 4 different categories. This occurred on the students second attempt at the quiz. We are using Moodle 1.9.11. Can anyone explain why we get the following response history on the incorrectly scored questions and why this occurred??