If you have a Forum node as the parent, and one as the child, the child does not act as a sub-forum, it acts as a forum in the same list. It should follow the sub-forum display rules you choose but it does not, it acts as a forum with same size row size and descriptions, like parent forum nodes. Thanks
As noted prior, this is a design issue that likely won't be addressed. They display the same as any level two forum in the node tree. You can nest the page in a category to get the result you're after.
This is kind of expected, and not particularly something I feel we should change.
The reasons for this are fairly difficult to explain, though essentially it's because we do not have any visual distinction between forum nodes which are at "depth 1" in the tree and "depth 2". The "Sub-forums" display only appears at "depth n" (depth 3 and above).
The only way to make a change here is to change the appearance of "depth 1" forums, but I'm not exactly sure which styling, if any, would make it clear. Any changes we made to "depth 2" forums would affect the usual children of forums within a...