Stat problem in game - cannot get perfection

Hei!

I completed a CTF game without dieing, and I had 18 kills, but i didnt get the Perfection medal. It happened 3 times since I started playing halo 4, but this round was even more annoying, since it said I had 2 killing sprees and 1 killing frenzy, but not a running riot, however I never died.

I took pictures of this, cause it is hilarious.
Score - 280
Kills - 18
Assist -2
death - 0
K/D spread - 18
Spree - 13
Medals - 35

WTF?

Why I never get the perfection when I complete the games without death?

Hello BenettaHansen.

The Perfection medal no longer exists in Halo 4. It has been replaced with the Perfection commendation.

Even so, you have not yet met the requirements for a Perfection. Yes, you must get 15 kills and 0 deaths, but it has to be in a SLAYER or REGICIDE match. Otherwise, it will not increment your commendation. Hope this helps!