A teacher can enter grades more than the assignment total points which gets stored under the Anomalous Grades feature. If this is done by mistake, then the teacher can generate anomalous grades by navigating to:
Menu >> Grades >> Anomalous Grade
By filtering these fields an user can generate anomalous grade.
If there are students in the class who scored more than the total points in an assignment, they will be listed here. Teacher can correct the grade if it was entered by mistake.