Is this your problem?
https://moodle.org/mod/forum/discuss.php?d=209334
Fixed in 2.3.3
https://tracker.moodle.org/browse/MDL-34363
I also am hearing from faculty that
"the course total is overidden by itself every once in a while , even if instructor has not touched the course total category" We can go in and manually take off the override and then it calculates correctly but they are sure they didn't click in the total area.
The tracker link below says all grades change, but in our case its not all grades, just some subcategories and some students grade totals. And that tracker issues says that problem was fixed with 2.3+
We are running
Moodle 2.3.3+ (Build: 20121208)
I am still getting this problem also.... Very frustrating... Anyone find out why some course categories and totals are getting overridden??
How do we start a ticket for this if we can't narrow down the problem?