XRAY - Model racing cars

I am confused on setting the ride height for my car. I noticed that there is front, middle, and rear ride height. When I set up the front to 4.5, the rear to 5, then I go to the middle and change it to 4, my ride height in the rear is affected. Is there something I should be doing differently, or should I not worry about the middle. thanks guys
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Hey, have a look on your setup book about ride height. Try to get the 3 point ride height same.... If you set front to 4,rear to 5.. try to get the middle ride height to something between that but make sure your car is sitting flat [ chassis-rear pod] when the car is loaded.