in the final line, there are all the items in that Board which use the navbox as a test.
The problem is, there isn't a clear distinction between the posts where the template is /linked/, and the posts where it is /transcluded/. It seems to be claiming that all the uses are transcluded, but at least one of them isn't.
If the detection is accurate but the display is wrong, then this just needs a wording change.
If the detection isn't accurate, then that needs to be fixed.
(Sidenote-for-later, probably needs a split bug: Also, given that Flow is moving towards a more topic-centric model, it might make more sense to list each topic separately? ) (Done, may only affect new edits)