Aerodynamic 'twist' moves the aileron neutral point 1.5 degrees to one wing(we'll say it's the right wing). If the roll spoilers would typically come up at 4 degrees it's now shifted. Neutral roll is now 1.5 degrees to the right so a roll input of 2.5 degrees to the right starts the right roll spoilers to deploy. A roll input to the left doesn't deploy the roll spoilers until 5.5 degrees(4 plus 1.5).
Numbers aren't exact but that's the basic concept.
Flaps 40 can be humbling or an opportunity to show off. And sometimes the attempt to demonstrate your skill ends up being very humbling.
