[Q] Posts keep falling into Q&A; Edit signature topic

I know that when you have less than a certain amount of posts all your posts are moved to a Q&A section. How many posts do i need to prevent this. Also, would like to create a signature. Do i need a certain amount of posts for this as well? If so, how many? My profile shows that i only have 4 posts, but when i look at all my posts i have 10+.

Thanks in advanced.