"If the bar twisted more then the car would stay the same height."
Respectfully, that's just ridiculous. When something pushes the wheel up into the wheel well the spring comes under greater tension because it is twisted more.
If the car is at rest and you turn the adjuster bolt and the bar twisted more then the car would stay the same height because the bar would be taking up the movement of the bolt being turned.
If the bar doesn't twist more when the bolt is turned then the car body will move because it is taking up the movement of the bolt being turned.
Now when the car is moving or going into a turn yes the bar will twist more because the load has changed on the bar. But sitting still the only way to get the bar to twist more is change the weight on the car.
You can believe it or not but it is simple physics.