Sometimes this happens because a student is enrolled in multiple sections of the same course.
To correct this:
  1. Navigate to onCampus > People > Academics > Manage Enrollment
  2. Select the correct school year
  3. Click View
  4. Under Academics, select the semester and the course
  5. Click on Drop and choose the reason as Change Sections.
Once this is done - check the credits. If this does not work,try to re-trigger the credits.