Course completion statuses are regenerated in a course where the course completed criteria have been altered. HOWEVER, the dates for the completion are now wrong in the "Completion progress details" report. The activities are shown as complete on the date that the criteria were regenerated. The completion dates are correct in the "Outline report."
When the course completion criteria statuses are generated, the completion date should be taken from the activity, not set to the date the statuses are generated.