That discussion was actually about the "Paths of the Dead" card, not "The Dark Door".
It was about both actually. Paths of the Dead pertains to the first part of my post (about placing Aragorn in Erech then adding Dead Men). I then went on to discuss another situation - moving the Dead Men through the mountains to attack Orthanc. I didn't have the card to hand as I was at work, and couldn't recall it's exact name. So what I said, about half way down was:
We also had some queries about Dead Men attacking Orthanc (by using the card ability which lets them move through the Mountains to Helm's Deep, Edoras and Westemnet):
It's quite possible some of the respondants interpreted that as our misunderstanding of a different card, but the card I was thinking of was definitely The Dark Door.
It's not important though - I did write a lot in that post, so it's my fault if some people didn't interpret it all as I intended. Main thing is, it's cleared up now.