I've progressed now to the Puzzle Mount in my travels. And I noticed the POIs are missing. So I tried adding, and there they are in "nearby" POIs -- so I didn't add duplicates. I instead logged out, and redownloaded all maps. Re-entered the zone and still no POIs. If it helps, this is the link I was using:
http://maps.eq2interface.com/poi.php...me=No%20Target This is the invisible POI: 64715