Making sub-forums private

[CaptainAwesome]

I have one sub-forum where see it exists, but they can't click through to see the threads.

I've tried to set this up for additional sub-sections, and while people can't click into the threads, they can see the titles.

I'm attaching an image showing how one part shows private where the most recent thread would show.

I can't seem to replicate it for the additional 2 sub-forums.

Any ideas?

Thanks