Logout and click back button still login

I found that when i login using demo/demo in demo web application in YII and i click back button and login again using admin/admin and when i logout admin, the loged in user demo still logedin after several times clicking logout(demo) and click back button the user demo filally logged out.

It is a bug or what maybe someone can explain that. Thankyou.

Strange… I just tried that on linux/firefox… and as soon as I log out the admin… there is no user logged in…

Did anyone manage to fix this issue? As I’m still finding that if logout and click the back button I am still logged in.