Don't use Oracal much but ave you asked the client how often they wash the vehicle? What they use as a soap? Did they use a pressure washer? Did they try to wax the vehicle with some type of buffer?
As far a the layered material coming up, we have found that in colder climates, when placing a second layer on top of a gloss laminate that as the car expands and constricts it has a better chance of curling on the edges and doing things that look very similar to what you have.
Also it looks like the the rear doors on the driver side gets used more than the other side, so perhaps someone is resting something on it or brushing up that is causing it ware down....