I sent a picture of the npc it does this to. Act 2 Q 2 Lieutenant Vachem you port to the outpost run up past the 1st check point turn the corner into the little town area there will be an untargetable friendly npc it stops spams all your attacks and attacks it forever. SS is here.
http://img205.imageshack.us/img205/222/31030666.jpg
If you still need a log let me know. It also does this in the command post for this quest it attacks the NPCs that turn into the mobs.
Great job though btw i went up 100k in core.