Why does it say that there are '9' posts in this forum, when there's only 1?
That's because there are (were, rather) nine posts in the forum.
When you get to the Forum's listing, there's a little drop box that currently says "Show topics from last 20 days." If you change that to the last year, you'll see the rest of the posts.
It does that as a way of keeping things easier on the readers.