If I understand you correctly, here is the answer:
(Sorry for my English if it s diffucult to understand)
The airplane is designed so that when the ailerons are flush with wings, the airplane should fly wings level with horizon. This is true only therotically. But in real life, this never hapens or is extremly rare. First of all, in the manufacturing phase, the airplane cannot be built as exactly (with zero error) as in the blue print or CATIA. If very luckily this happens, this is called as
"in-rig" airplane and while flying with this airplane you can see the ailerons are almost flush with the wing. Even this is only possible as asuming the engines are producing exactly same amount of thrust (for twins), the fuel in the wing tanks are weighing same and there is no yawing moment induced by rudder, tail or any other component of the airplane. Since coinciding these parameters are very difficult, for any type of airplane, you will keep seeing deflected ailerons varying their positions depending on the phase of flight, regardless it is a highly sophisticated fly-by wire A 320 or Cessna R 172.