"Log In As" changes "Last modified (submission)"

Test 1 Create a course with at least three students and an instructor. Create an assignment and set it so it was due to be submitted by the students an hour ago. As the instructor, click on the assignment to view it. On the "View assignment" page, verify there is only a hyphen displayed in the "Last modified" cell of the "Submission status" table. (This is just below the "View/grade all submissions" link.) Click the "View/grade all submissions" link. On the "View/grade all submissions" page, the "Status" column for all students should show "No submission" in black text on a grey background, followed by "Assignment is overdue by: X hours Y minutes" in red text on a white background. Also, the "Last modified (submission)" column should display just a hyphen for each student. Click on Student A's name, then log in as Student A. While logged in as Student A, click on the assignment to view and do not submit to the assignment. Verify the "Last modified" cell of the "Submission status" table displays only a hyphen and not a day, date, and time. Log back in as the instructor and visit the "View/grade all submissions" page for the assignment. Ensure the displayed information for Student A in the "Status" column still shows "No submission" in black text on a grey background, followed by "Assignment is overdue by: X hours Y minutes" in red text on a white background. Also, the "Last modified (submission)" column should still show just a hyphen. Click on Student B's name and log in as Student B. While logged in as Student B, click on the assignment to view it and submit the assignment for grading. After submitting to the assignment, return to the "View assignment" page and verify the "Last modified" cell in the "Submission status" table now displays a day, date, and time. Log back in as the instructor and visit the "View/grade all submissions" page for the assignment. Ensure the displayed information in the "Status" column now shows "Submitted for grading" in black text on a green background, followed by "X hours Y minutes late" in black text on a rose-colored background. Also, the "Last modified (submission)" column should now show a day of the week, date, and time. While still logged in as the instructor, click on the pencil icon in the "Grade" column for Student C to access the grading page. On the grading page, click "Cancel" and do not give Student C a grade. This will return you to the "View/grade all submissions" page. On the "View/grade all submissions" page, check that the "Status" column for Student C displays "No submission" in black text on a grey background, followed by "Assignment is overdue by: X hours Y minutes" in red text on a white background. Also, the "Last modified (submission)" column should display only a hyphen. Test 2 Create a Team assignment and repeat the tests for "Student A"