XFinty web site keeps prompting me to sign in every time I navigate from one part of the site to another. For instance, after I sign in (Stay signed in checkbox is checked) and go email, then to home, I'm promped to sign in. Simply put, I am constantly being asked to sign in as I navigate the site.
By "home", do you mean "My Account" at the top of the page? If so, then you should be asked to sign in again for security purposes. Or are you clicking on something else?