If a student has correct enrollment rows but is showing up with the wrong grad year, it might be wrong in the student's alumni affiliation.

To fix this, navigate to:
  1.  Navigate to Core.
  2. Using People Finder, search for the preferred student> Select the student.
  3. Select the Access tab.
  4. Beneath Personas, select Alumni Affiliation. 
  5.  Select Edit.
  6.  From the Alumni Class of drop down, select the correct year. 
  7.  Click Save and Exit