centerReg() will center the registration point and center the object on the stage or container. But pos() works with edges and not the registration point. So when you pos(60, etc, RIGHT, TOP) you are positioning the right side of the object 60 from the right side of the stage. You could pos(0,etc,CENTER, TOP) and it would center them. You would not even need to center the reg at that point, unless you need to for animation of scale or rotation.