Last I saw..

[gab13by13]

1. When I was a lot younger

I was pretty good betting on football.

The first thing that I learned was about bookies' point spreads. A 2.5 point underdog does not mean that the bookies believe that Buffalo will beat Kansas City by 2.5 points. It means that making the spread 2.5 points should get an equal number of people betting for Buffalo and Kansas City.

If I saw a pointspread that appeared to be off, that appears that, in your example, everyone should take Kansas City and the points, from my experience, Don't Do it. The spread may change between now and game time so that will tell who people are betting on, which cancels out what I just posted.