How does slayer scoring work?

Does anybody know how a game would make it to a score of 111 kills to 102 if the least you can get is 10 points for a regular kill and the score is supposed to be to 1000?

https://app.halowaypoint.com/en-us/Halo4/Veive257/home/match-c3e27f44dec7723f

10 points per kill
no other medals (assist, wheelman, etc.) are added into the score

After the game destroying a vehicle counts as a “kill” which I think is stupid, but whatever. That’s why after some games it will say you or a teammate will have more kills than you actually did.