Welcome to the Forum from Western New York State! When you log in, there's a small box to the left of "Remember Me". Check that when you log in and your login won't time out.
Unfortunately, yes you do. If it said you weren't logged in at the time, the thread didn't post. I've done the same thing, before I was told about that little box.
Unfortunately it happens, I’m not sure why. I’ve lost some good long winded posts that didn’t send when I hit the button and then it told me I wasn’t logged in anymore. Extremely frustrating.