Quest Bug at crature egg think quest

If u got 2 npc(animal npc) with same quest it ONLY COUNT 1 QUEST and the other CAN'T be done it says 0/(number) and never ever get +1 for the quest PLSSSS FIX :l
Bug quest i mean like defeat starfish 0/(number).Quest from npc1 can be complete but quest npc2 cant be done always stay 0/(number) however u kill the starfish it not count at npc2