Schedule timing is a HUGE thing. Did you catch Texas the week before the RRS? Did you play TCU the week after they got beat up playing very physical KSU? Did you play a team rested coming off a bye? Did they just put in a future star QB that you don't have film on? Did you play a team early when they were still figuring out a new offense? Or later when they were firing on all cylinders? Did you play them the one week their star stud QB was out injured? Did you play them the week their whole team got dysentery?Do strength of schedule calculations also take into account when and where the games were played? Seems as though certain teams can be considered much stronger at certain times of the year based on personnel available, injuries, quality of play, etc.
Often, a team like Iowa State improves a ton from September to November, while this year's Baylor time likely phoned it in from mid-October on.
Then again, there is likely bias that has to be considered, too.
You would like to think these things balance off, but in a season with only 12 games, they don't always.