I think I can help- When you sign in,,, click the small box under the login name and password that says STAY LOGGED IN. that will keep you logged in until you click on the LOG OUT button. I typically just stay logged in because I'm the only one using my computer so I know no one else is going to get on here.
If you are on a shared computer, just remember to click LOG OFF when you are done.
Hope this helps
...and on that day when my strength is failing, the end draws near and my times has come, still my soul will sing Your praise unending, ten thousand years and then forevermore!