[Achievement] Hellbugs Research doesn't work

Hellbugs Research I shows 0/3 for Hellions and Matrons
Hellbugs Research II and III shows 22/ Hellions and Matrons (both same as 22 Monarchs)

Plus I'm pretty sure I haven't killed that many Matrons. But I was killing few on major arkfalls. Monarchs might be right if it only count the one I've killed solo.

So it seems like Matrons/Hellions do not count (hope it's not "killing blow" that would be insane). And wrong number is shown for II and III research.