questions about forum use

[old cool]

I have a couple of questions about using the forum wisely and more efficiently.
Hope this helps others as well.
1. On occasion, I am unknowingly logged out of the forum while posting or responding to a thread. I'm not sure if I've accidently hitting a key or if I've run out of response time.
2. I have never been able to search by topic. I always get the message:
"sorry, no matches"