Question - A staff member who left is showing as active
Answer - Go to Admin>Personnel>Staff and find the staff member from the drop down box. Click on the cog next to the staff member's name. At the bottom of the screen, change the "Active" field to No. Click update being careful not to click Delete.
If you can not see this cog icon then you do not have the correct roles to be able to do this. You need the Sysadmin role.