did last week I agree why they did it. Obviously the 17 point win wasn't indicative of how close the Houston game was. That being said beating Houston by 17 and then being Favored by 20 against 1-5 Texas State (despite how close their losses have been) probably felt like easy money for BYU to cover.
Also, Texas State's secondary is a shell of its former self. I expect BYU to be able to pass and pass all game long