You see Vanzack, your argument is flawed to begin with and here is why:
betting on the favorite ATS and on the dog ML makes no sense to me.
You assume that the favorite is the team who should win the game, and that assumption is utterly wrong.
I don't base my analysis on the lines bookmakers come up with.
I base my analysis solely on my own opinion. If I am good enough to read certain matchups corrently, I don't bother about the spread. I am being serious.
Yesterday I wagered on 4 games:
Ravens ML, Bills ML, Falcons ATS and Patriots ATS. Not taking the points in the Ravens game costed me 1 unit, but the Bills ML made up for it plus a lot more.
I don't care about the spread to the point that I never take the points when I bet an underdog. I MUST BELIEVE IN THE DOG TO WIN STRAIGHT UP; If I don't believe the dog is going to win straight up and take the points, I am simply betting that team A won't lose by more than X points vs team B. No thank you, I am not interested in that with the NFL. Maybe it works better in the NBA, but even with bball I prefer to take dogs ML.
Anyways, thanks for the heads up about the "randomness". I will keep that in mind at the end of the season when the sample size will be larger than it is now.