I've encountered a few mobs that for some reason when the same mob is found in a different map they appear as a different mob with different names, for example Fairy, appears as Fairy 1, Fairy 2, Fairy 3, Fairy 4... only “Fairy 1” would drop and appear in the monster book, while the rest do not. You can double click on mobs and see them in the monster book, but when you try and click on Fairy 2 and so on nothing happens. This also happens with Jr. Boogie (1, 2..)
