Your instructor may have the gradebook set to not show aggregates. The gradebook allows instructors to display the grader report in three ways: Grades Only, Collapsed and Full View. You can get more of a description of each in the Moodle Docs - Gradebook_Display.
Just in case you can't see it from their picture, the icon they select is like below. Your instructor may have selected this icon so that it is only showing grades and not the aggregate; which in this case is the course total.
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