I had a similar issue with the main quests.
I knew where it was, but the quest icon wasn't showing above the persons head because of a graphics glitch.
I logged out and back in (this was 4am EST, so I was able to do that), and the quest showed up on the main map, but couldn't see it on the person.

Anyways, i ended up having to rotate the camera in a really weird angle from a certain spot and it showed up and was able to do it.
But the moral here, is check the maps thoroughly. You may have to go to each zone to see because they don't show up when scanning the maps from other zones.
The recommendations list also doesn't show anything from outside your zone (which is dumb)