new Grader doesn't allow you to unrelease a grade by clicking "Save" (not save and release)

Add an assignment, using points. Let assignements create a gradebook item for you. Grade the assignment. Make sure the User Sakai grader checkbox, on the submissions list, is checked. Click on a any student. Enter some points for the student and click "Save and Release to Student" Go into gradebook. You should see the grade for the student. Now go back into assignments and click Save on the same student's grader page. Go back into Gradebook. The grade should have vanished. Login as a student and click gradebook, you shouldn't see the grade.