We have a few people enrolled as Managers at the system level. However, they are displaying in every course when the instructor(s) try to grant a User Override to students in their course. These Managers are not enrolled in the course, and are not displaying in the gradebook, when viewing assignment submissions, or in quiz attempts (unless you choose to view "enrolled users who have not attempted the quiz" and "enrolled users who have, or have not, attempted the quiz").
It doesn't affect functionality that these people are showing, however it freaks the instructors out when they suddenly see 3 names in their course that do not appear in the Participants list.
Any suggestions of what changes I need to make to "Define roles" to remove them from these lists?
Examples - Managers are annotated with red arrows: