[MakeshiftWalrus]

The Assassin NPC will incorrectly state that monsters he has killed still remains on the floor, via the little tally counter. This is only visually incorrect, though, everything functions as it should-- full clears can be had, you can't use his services again, as well as it'll tell you the floor is cleared through the chat warning. The number, however, persists, even if you leave and come back.