Eventhough I sign out, I can access my site from address bar history in Internet Explorer. How is it possible? I've signed in my account from a public PC before, will people be able to access my account from the PC I used there?
If you are worried about privacy using a public computer, just clear the browser history after you finish working on the PC. This can be done in Tools > Internet Options. Clear cookies and temporary internet files. This will ensure that no one will be able to access your account.