Marker allocation is completely ignored in assignment grader page. This means markers are not restricted to only mark the students they are assigned to and can actually marker anyone in the course. Via the change user drop down menu the restricted marker can actually see all students on the course and accidentally mark students they are not assigned to. On the view all submissions page the restriction is applied and they can only see their students to mark. But on the grader page they can access all.

Solution: Marker allocation should also affect the "change user" drop down menu on the assignment grader page. This would allow for quicker grading by staying on the same page and using the drop down menu.

Replicate by:
create assignment with marker allocation set to yes.
assign a marker to 3-4 students
log in as the marker and go to view all submissions page (the marker can only see their students)
click grade to grade one of the students, grade the student and click save
go to the change user drop down menu.
The marker can see all the students on the course and not just the ones they have been allocated to
this could lead to marking the wrong students, over marking or remarking.