Ion_auth remember me IE 11

if you set value 0 when you close brower  CI dont save sesssion for you 

I know, but something else does!!! I tried setting sess_expiration to 3600 (1 hour). I closed the browser, opened my website after more than 1 hour, and it logs me into Ion_auth as if I had checked the 'remember me' option. Which I didn't! For some reason, my web browsers is keeping the session active, regardless of my CI settings.
Checked it on another computer also (same browser). No problem at all. It really puzzles me.