Video! Gamplay. Killstreak wrong.

I had this game were I got a tripple and a dubble and I'm just curious how it reset to a tripple so fast. I got it to 7 sec between tripple and the next kill. Should it not reset on 10 or 15 sec? Sorry for the bad quality on video but that was the best i got, but you can clearly see it took 7 sec between tripple and lee kill. I think the lee rq that made this so bugged.

Pls leave ur own toughts. If u know the reason it reset pls tell me.