How many posts per day count towards activity and rank up? Is there a limit?
What is the difference between activity and posts?

I am noticing my posts do not match my activity numbers.

When you make your knowledge-base, be sure to let people know that your rank does not raise over time. I joined over three years ago. I lurked instead of posting for the most part. I recently got tired of being marked Newbie and started posting.

Also, can newbies get merit at all?