[video=youtube;PbjhtUIG9MA]http://www.youtube.com/watch?v=PbjhtUIG9MA[/video]
So I beat G18, and am working on G17 right now. I'm at that dreaded giant lion RP, and for some reason I've got two Shamalas. Both Shamalas offer to take me to the mission first, and if I say no they bring up the standard NPC interaction thing.
But one of them has a 98% repair success rate and the other one lists a 0% repair success rate, and both of their shops have different colors for the ordinary dream catcher.
So the earliest quest I can think of with dynamic NPC placement is Rush Of love, the G16 sidequest for the fighter skills. So I assume that it's only quests added after this that can have duplicate NPCs under the right circumstances? Has this happened to anybody else? I don't know if the G16 main storyline has dynamic NPC visibility, I haven't done it yet.