Judge - it quite clearly says, in teh feat, that you are only immune to fear effects of the defeated type, and gain a +2 to will saves for terror.
So the actual immunity is a one-monster deal, until you have killed another monster which you can then add to your immunity checklist.
Tarot - that probably the best interpretation, even though the book does emphasise it as being terror of the unknown, only affecting a character the first time they encounter something.