What's incorrect? They gave up 38, 42, 27, 27, 32 in their last 5 playoff losses, which is 33.2 PPG. The only reason they didn't give up more in 2 of those games is because the Bills controlled the game on the ground and held the ball for so long and KC fumbled at the 1 yard line going in for another TD. I mean the defense couldn't stop a nosebleed in most of those games...they force 8 punts in 5 games, TOTAL.
The Eagles forced the Chiefs to punt 6 times in one game a week after they did whatever they wanted against us the entire game when they hadn't score more than 30 points the entire season, and 1 of the 2 games they got to 30 points was in OT.
In the Bills 4 AFC Championship games they gave up 3,7, 10 and 13 points = 33 points.