This is usually caused by the Roster being edited and Student(s) being Added/Dropped from the course.

When you click into the Assignment, this will physically display the correct numbers such as Graded: 19 of 21.

We run a script in our system every Friday that will take care of the incorrect numbers being displayed. If by the next Friday the issue is not resolved, please see How do I contact Blackbaud K-12 Support? and provide the following:
  • Teacher Name
  • Course Name
  • Name of Student(s) that were added/dropped from the Course
We will then further review the issue and see what else may be causing the incorrect number to be displayed.