dark priest hit witchie for -1 damage? mob spell damage bug

[Grox]

Obvious exits: northeast, northwest, southeast, southwest
The room is dimly lit
*Combat Engaged*
*Combat Off*
*Combat Engaged*
The dark priest throws a spiritual hammer at you for -1 damage!
The dark priest throws a spiritual hammer at you for 3 damage!
You cut dark priest for 30 damage!

Name: Grox Mox                         Lives/CP:      9/0
Race: Half-Ogre   Exp: 95255           Perception:     34
Class: Witchunter Level: 9             Stealth:         0
Hits:   133/133   Armour Class:  50/8  Thievery:        0
                                       Traps:           0
                                       Picklocks:       0
Strength:  100    Agility: 50          Tracking:        0
Intellect: 40     Health:  80          Martial Arts:   14
Willpower: 25     Charm:   25          MagicRes:       28

[The Crazy Animal]

This is a comformation on this one got hit for -90 somehting by a warlock bandit when dealing with a different bug..