It takes 2-3 tries, with weapons like the homing missile especially, for it to count as 1 completed... mucho dinero down the dran-o...

the same kind of tasks keep rotating- I guess that's on purpose though..

That task is broke for me too, and now, I have a "stick to your guns" task which demands 13 banana bomb kills and it is not counting those either. So I'm stuck with 2 tasks that don't count my carnage. Hopefully the next build will patch things up.

Yup, we've got this patched in the next build which we hope to have out soon. Sorry for the bug, but thanks for reporting it!