Problem in sign out and change in user account

In my site after i log in with a user, and when I try to logout or try to signin with different user, again it o开发者_如何转开发nly log in with the same user. After logout also I remain in Same user.

Check the Security Settings for appropriate zone in Internet Explorer options.

If you're using default settings, the sign out function does virtually nothing, because next time you visit the site you get signed in automatically.

I've got the same problem. It seems to be a weird behavior from SharePoint. But if you refresh the page two to three times the SharePoint page will show the right user at the top right.