Won't stay logged in, can't log in...

I erased old bookmark and saved new one rather than editing. Closed browser, came back and had to log in again.

My bookmark is "New Posts" if that helps.
Tried it again. This time I went in at "Home" and the to "New Posts" and bookmarked "New Posts"

Closed browser, opened my bookmark for "New Posts" and no problem at all.

All is good.