The refs call that said the KC receiver got possession instead of a Bills interception, I think was even a bigger blown call than the first down or not. I saw a video showing the Chiefs receiver only having one hand on the ball, while the Bills receiver had both and looked like the only reason ball wasn't moving was because the Bills player had the ball in control as they were landing to the ground. Should have been either interception or incomplete when ball touched the ground.
Other than the refs, that was a great game that lived up to the hype.