In overview report for all students in course and for a specific user there is a problem in rank column. For course total grade the report gives information in XX/XX pattern (number of users who have entries with higher course total grade in grades table in the course / number of current students in the course). The result may seem like 54/52 which confuses people. I's like you are 54th out of 52. But in fact it means that there are 53 users in the system who got better total grades in this course since the beginning of the course and now there are 52 enroled students. The 1st number must be lower then the 2nd or equal (1st/2nd).
Global overview report settings are here:
Local overview report settings are here:
where XXX is the course id.
Tick 'Show rank' and pick an option to show totals.
- Enrol some users and get course totals.
- Unenrol some users that have high grades.
- Check the report of the user with lowest total grade.