1961 or 1962 Lancer 770 front fender molding

Unlike Hyper-Pak I've never had any difficulty interchanging these from right to left. However, when doing so you must remove the clips which are "offset" and reinstall them upside down or opposite (rotated 180degrees) of what they were on the other side. And when sighting down the length of my spare chrome strips they are straight and do NOT have any appreciable arc to them. How to account for the very different experiences with this trim is mystifying me.