First off sorry for the blank message. I was button mashing lol. What i meant to say was that i can agree. Sometimes when on my desktop, even after clicking that box i get logged off very quickly. But when using my sisters laptop i have been logged in for about 4 months, same situation with my phone, 3 months. I just figured it was my computer being stupid.
Sent from my Samsung Smartphone using Tapatalk. When I should be doing something more productive.
I can go months without logging in, which is kind of nice. It sounds like that's in your settings. Like delete cookies, temp files, etc if you close your browser, idle. If you click tools, internet options, and go to you cookies/temp files, there is a option there to click that says delete files when browser is closed. That could be it too.