The purpose of this report is to help you find events with strange enrollments. This can happen because someone has assigned to small groups to one event, or accidentally assigned students from another course to this course.
Path: Home > Courses > [Course Screen] > Events > Enrollment Per Event
Under most circumstances you will see the same basic numbers again and again, such as the total number of students (large group events) and the basic small group counts. You need to look for enrollment numbers that look odd.
NOTE: This report is a sanity check to make sure that no obvious group assignment mistakes have been made.