Here is a potential bug that I've encountered when grading quizzes or tests. When I scroll through the test questions, if I have clicked in a score field, scrolling causes the numbers in that field to change. I try to be careful not to click in the field until I'm ready to add the score, and I try to be sure to click out of the field when I'm done, before I move on to the next question. But I've had a number of times when I still get huge discrepancies in the grade for a question (such as -90 points). Usually, I've been able to catch this before I'm done grading, but it is a disturbing behavior of SpeedGrader.
I am using a Macbook Pro with trackpad when this happens. I have Mac OS 10.10.5 and use Safari. I haven't tried grading in Firefox to see if it exhibits the same behavior.
Perhaps there is a setting I can change for scrolling that would affect this. Any suggestions?
If not, should I submit a bug report?