UBB.threads PHP Forum Software Community Forums Resources and Customizing How Do I? Recent Posts Island

I am using 7.2.2

I have a Post Island set up for Recent Posts. I selected the forums I want as Source Forums - which is all but one forum that is for Admins only.

The problem is... when I make a post in the Admin Only forum it is showing up in Recent Posts, even though I do not have it checked as a Source Forum.

Is there something else I need to do?