I know this bug has been around a long time, and I don't know whether you guys have attempted to change it, but I might as well make a forum thread about it. Basically, I don't know how this works but I do know that about 50% of the time, void kills don't show up and consequently don't get added on to your stats. Over my time playing warzone, I've lost about 500 kills, yes that much, to void kills not showing. Rather than saying so and so was slain by so and so, it rather just says that the person fell into the void. I don't know if this will be easy to fix and probably isn't at the top of your priority list however, I thought I might as well highlight it, to at least get a chance of you guys managing to fix it.
Thanks for your time
- alphacks

We're already working on to recode the death messages custom and custom coding the kills detection

A release will be tonight or tomorrow :P