First off you are cherry picking games here to try and point out some flaw. You cant just scatter pick games. Secondly, the Bills are the #2 offense in PPG in the NFL and #1 by a wide margin in point differential. The Bills are the #3 offense over the last 3 games in ppg without cherry picking. That is 1.6 ppg out of first place over the last 3.
You cant just scatter pick games to try and prove some point and call it concerning. You can do that for every team in the league. You think other teams just score 30-40 points every game? They dont.