Poison from Ant Mobs

not sure if this is bug but fighting ants on wastelands my servitor got 2x poison...

http://imageshack.us/photo/my-images/35/shot00000ej.jpg/

this should be that way, or my servitor should get only one poison?

 

that's the way ... they are stackable

 

i got 2x poison too, seems the smaller ants and the captains can poison you one time each.

 

deadly poisonous ants attack

i think debuffs of the same kind should not stack... but i'm not the boss here i guess

 

if 2 diferent types of ants poisons you they will stack

 

both exactly same skill name.
exactly same description.
exactly same effect lvl.

i think its a bug when both debuffs come at once

 

i have encoutered this bug, unfortunatly i died before actually getting a screenshot (devotion set vs 4 mobs xd). the mobs were all same type. ant soldiers. 3 of them cast poison and the debuff stacked.

3 poisons from 3 mobs of the same type (same level debuff, same type) somehow feels wrong.

can anyone find relevant patch notes on this issue?