Mike - The Blu-ray forum is a totally separate "forum" from the RAH area. Since Robert is choosing to post his threads in that area, that is where they show up. In order to see them you would need to subscribe to the specific section where he is posting them.
Now with respect to your final comment about looking and acting like a sub-forum, it absolutely works as intended. Unfortunately - if nothing is posted there, you won't see it in your Content I Follow. Huddler had a unique bug/feature which showed all subforum posts in the parent forum's area - something that does not work the same way in IP.Board.
I have absolutely no doubts about what you are saying about how the forum software works.
I'm just providing feedback from a user's point-of-view. It sure LOOKS like RAH's threads are in the "A Few Words About..." sub-forum.
This is what I see when I click on the "Blu-ray, DVD, Streaming Video and Digital Download" button on the Forum Nav drop-down menu:
It "looks" like there are two sub-forums in the Blu-ray forum: "3-D Blu-ray" and RAH's "A Few Words About...".
Then, when I click on the RAH link, it takes me to an index page of RAH's threads...which makes it look like they are neatly oroganized in the sub-forum:
So why I don't question the way you say things are set up, it is confusing to users if the forum doesn't represent things the way they are.