If you have not selected the Automatically keep final grades updated option, you may have to manually recalculate final grades at some point during your course.
On the navbar, click Grades.
Do one of the following:
To recalculate a grade, click a user's name. In the Final Grade section, click the Recalculate the Final Calculated Grade icon.
To recalculate all grades, from the Final Calculated Grade context menu, click Grade All. On the Final Grades page, from the Final Grades context menu, select Recalculate All.