I have never paid much attention to spread, know not to place any stock in it, and understand its mostly window dressing.
That said, I always thought there was some consistent calculation behind the scenes. Thus, even if it wasn't accurate, it was consistent. I am now wondering if there is more randomness than I thought.
Case in point: I am playing a conference mate back-to-back (pm game, am off, pm game) at D1.
We both have A+ home court.
1st game, at his place: I am favored by 1 (I win by 3)
2nd game, at my place: He is favored by 1.
Virtually as little has changed between the 2 games as possible and the main difference is who has home court. A consistent system, would award my team a few more points for the game being at home. Instead, his team is favored. Much ado about nothing, I'm just bored waiting to see if I'll get Ferrum back and this struck me as odd.