I have this rig set up with a IK constraint that has one bone that acts as the control for the leg armature (Labeled in Screenshot). I have been following a tutorial, and it shows me how to rig it, but apparently I am missing something. When My control bone moves far enough away from the IK bone, it will "migrate" away from the bones - see the picture. Is this supposed to happen? What must I do to make this work correctly?