Hello I have created two users on my development platform one admin and one a general user.
When I login using the 'general user' and go to a page that the admin has used, the system thinks the admin user is logged in. It is the same in reverse.
I make sure I log out each time when I switch users but it does not clear the cache or cookies or whatever files it should clear when a user logs out.
Attached are two files (dean.jpg and admin.jpg) one showing the user dean logged into the home page and then I pressed the 'People' menu open and it shows the admin user logged in.