That's odd...
These guys are heavily scripted, so I'm wondering if there is a delay in processing the code from the time of resurrect to aggression/start combat. Perhaps it's just the timing of your attack? Are you running any mods which might effect any of their faction "evil" flags?
I can't find a way to adjust stats. Of course removing a bounty is simple enough, but doesn't really help you in this case.
Anyways, I know my post isn't of much help, I just found the topic intriguing. Hopefully someone has a more definitive answer.