In Gradebook User report, excluded grades appear as "Dropped" with an odd contributed value

When viewing the User report, there are oddities about the display of excluded grades. This is the case for both teachers and students.

Replication steps:

• Requires a course with multiple grades and students

1. Log in as teacher/admin
2. Navigate to a course's Grader report
3. Turn Editing on
4. For the grade item of a student, click the Edit cog
5. Check the Excluded checkbox
6. Save changes
7. Go to the User report
8. Select the student from the drop-down menu

Expected result: The grade for the excluded grade item should be a dash - with the word "(Excluded)". The value in the Contribution to course total should be zero.

Actual result: The grade value is accompanied by the word "( Dropped )" and the value in the contribution column is some odd high value.