which explains why Ole Miss has such a poor record yet can put up 714 yds. against LSU.
LSU (which is an excellent team at #3 overall in SP+) has the #29 SP+ defense, so some teams are going to put up points yet still lose to LSU's #2 SP+ offense.
A more-extreme example is Oklahoma. #1 SP+ offense, and #41 SP+ defense, and still #6 SP+ overall.
Or going the other way, there is Georgia, with #34 SP+ offense and #2 SP+ defense, #5 SP+ overall.
On top of such things, there is the usual variability game to game.
So, there end up being games like LSU vs. Vanderbilt (#102 SP+) giving 66-38, LSU vs. Ol' Miss (#55) giving 58-37, and LSU vs. Arkansas (#108) giving 56-20. Teams that are #102, #55, and #108 by SP+ are not good. They scored some points on the #29 defense; but the #2 offense blew them out of the water.