Normal - it's furthest away from the blower.
If it really bothers you -- maybe you should open your windows and enjoy the fresh air.
The centers not only do it because of physics, but becuase if you have your airconditioner on, you want to cool down the entire passenger compartment. So having cool air blow right on/near a window would be inefficient, so the centers are used which blow the cool air into the center of the car.