Again, if I had the time to fully explore the situation, I would not make this note and would have just made a new changeset, as per my usual "just do it" call for action.

You must at least acknowledge that "problem discovery" is iterative. At first post, I was not fully aware of the concourse situation, and was planning a detailed look later, which may or may not reveal OSM issues. At second post, I noticed that the data is inconsistent, which confirmed an OSM issue. At subsequent posts I am gonna fix the discovered issue(s) for real.