Add Volume to the Volume Controller Dynamically

[_Aka_]

The volume controller's position is tied to the volume, and not the spline. So if you don't update your position, which is let's say a relative position of 0.5, switching from volume A to B will move the controller from the middle of the volume A to the middle of volume B. So each time you switch volume, you will need to update the controller's Position too.