The instructor's "overview" page of the gradebook displays "Due Date", "Average", and "Points". The student view displays an additional letter grade from the "Grade Conversion" that is calculated according to the formula entered on the instructors "grade options" page. The instructor does not see this letter grade.
The assumption here is that the instructor has previously gone to the "grade options" to enter the correct grade conversion. If the instructor fails to do that, the "curve" may be incorrect and the students will see grades that have no bearing to how well they are actually doing in the course.
Since the instructor does not see the grade conversion on the main view or roster view of the gradebook, there is no feedback that the grade conversion is happening, or that it is correct or incorrect. There is no incentive to actually go to the "grade options" screen to do the right thing, the instructor must have prior knowledge of how the tool works in order to know to set it up correctly. Even if the instructor does visit the "grade options" screen it is not clear what the grade conversion is used for or where that displays, the instructor would actually have had to visit a course with a student account to understand this clearly.
The fix is simple: display the letter grade on the instructor's main "overview" page of the gradebook.