Assignment

I'm having issues grading an assignment submitted by 2 students. It was also submitted by 7 other students and their grade entered just fine.

What happens is, I try to enter a grade in either the quick-grade screen or the regular grade window and it simply doesn't stay! I save it after and when I check back, the grade is gone!

Issue #1, the student sees the grade but the Admin/Teacher doesn't

Issue #2, even trying to edit the grade manually using gradebook pro, nothing sticks, and it's only for these two students on this one assignment! All other assignments work for these two students and all other students can submit this assignment.

Help much appreciated.