sounds like your internal meters(or shutter speeds on the gear train/transmission in the camera) are a bit slow. I'd be hesitant to call foul on the part of Fuji. More likely your lab(aforementioned "push process" by someone else), or a slightly slow shutter in-camera.
Another reason(if you can afford to do it) is to buy in bulk, and freeze until you consume(shoot) it. Not very hard to do, just convince yourself(or if you have a better half, them ) that you "NEED" a film freezer, and they can put the extra frozen veggies in there in case they need some room