Chris,
What browser do you use? from time to time I do maintenance on computer to remove unwanted cookies and others bugs that attach themselves without being identifies. They are tracking cookies that follow your movement and some of the ads are catered specifically around the stuff you surf. Free ware like CCleaner and Ad-aware are great to get the pesky bugs out of your computer. Almost any where you go on internet they deposit a cookie on your computer that actually help quicker access to the page but it also allow them to link you IP address (Internet Protocol) to a site. it is weird the way it happened when you were logged out. You can only be logged out if you actually deleted session cookies or a auto maintenance was going on. I use Fire fox that allows you to have a decent Add Block add that gives you plenty of control over all the unwanted add, additionally Firefox allow you to save your login information in an encrypted file with a master password to fill it automatically like when you check your bank account, credit cards and other bills. Firefox takes a lot less computer resources and there is ton of free usefully stuff out there for it.
JC,
If you use explorer you can add Tractorbynet to your trusted site and along with "remember me" will save and use your session cookie.