I have set up my forum to show, at the main page, the recent activity. That is fine. However, in some threads, there is also a side box, and I didn't put it there. Is that a dynamic content for the same box?

 

It SEEMS like it is all the threads I started, but that seems to also be visible to non-logged in viewers. I don't mind seeing that on the admin account, but can I remove that for non-admin?

This is called the "Topic Summary" you can adjust settings or disable it in ACP -> Community -> Forums -> Settings

Thanks. That did it! I was able to not show at all. I don't think that in my forum, it is needed.