Dan, be sure that your browser allows cookie files from Farmallcub.com -- this is how it keeps you logged in and remembers the posts you have read.
PS: If your browser is set to maximum privacy mode, it will most likely clean out all of your cookies and browsing history too.
"Tomorrow is the most important thing in life. Comes into us at midnight very clean. It’s perfect when it arrives and puts itself in our hands. It hopes we’ve learned something from yesterday." ~ John Wayne