by Emma Richardson.
Are you totally sure that the teacher did not put the feedback in for the wrong student by mistake?
Also, there is an issue where if the teacher opens the gradebook in multiple tabs, the grading can get confused because it uses rows instead of user ids to identify which grade it is working so if the gradebook gets filtered or sorted in one tab the grading in another tab can get sent to the wrong student...I think it more likely that the bug or error is on the grading input side rather than the viewing side..