This unfortunately. God I hate that Bounty. Back when I played Sunsinger on PvE it took me a while to figure that out because I wasn't going back to my Inventory to track the progress. I was just trying to get my Super up (without Juju) and trying to multi-kill people with grenades or whatever. I assumed I needed to multi-kill X with the same grenade to count as "1" for the bounty. And I hadn't learned the Moon-checkpoint cheese to help with that. Like 30 minutes later I assumed I was almost done (again, no cheese and no juju) and... w t h. Nothing. Not a one.