I'm having an export issue with gradebook from version 2.9.1. The grades, as shown below calculate out correctly (except for the group average, which I'm not concerned about, but maybe it's related?). When I export the grades to: opendocument spreadsheet, excel, or plain text, the category and course totals are incorrect. Any suggestions on what to look for? The names below are in the same order, and if you notice, this first name has a 46% in the gradebook but 8% on the export. All the grades are off, and none by the same factor. Category totals are similar. If the export includes letter grades, the letter grade matches the percent grade of the export, not the page display.
Grade averages aren't calculated correctly when suspended users aren't shown. Maybe edit a grade to get the grade book to recalculate. We would need to see the categories and items area to know more. Also create a backup with anonymized user information and restore to a demo site. There would be issues with student submitted documents that might have sensitive data. It could also involve excluded items or ungraded items.