Didint get credit for achievement

[ESPADAS03]

So I was playing warzone and my team was obliterating the other team for once and my whol goal was to not only win for the daily req pack but also to get one legendary boss kill or an assist in order to get the one last kill I needed for the achievement. well tank master Rok rolls around and he is a pretty easy legendry boss, so I bust out my rail gun and wait till his health is half depleted I start to unload with the rail gun and finally he goes boom and at the bottom of my screen it says Legendary Boss Takedown and I'm goal oh yea got it the last one so I don't pay attention to killing any other legendary bosses and focus more on killing the other team as they try to get the kill, which innturn grants my team the kill and no random DMR shot in sight from red team lol.

 

Well at this point I'm expecting 3 REQ cards for my hard work and what do I get one yes one REQ card I didn't get credit towards this commendation for that kill yup the game basically said well you only need one but we are not going to give it to yu since by ding  this you will receive two req Cards one for the commendation and one for completing the warzone commondations so now I'm not even going to try anymore since  know it wont give it to me at all.

 

Just one more reason warzone has giving me the shaft on something.