At the end of Chapter 6/ beginning of Chaper 7, when the truck smashes through the warehouse wall and goes over the cliff the rear wheels and axle become completely detached from the undercarriage, but when the truck plunges into the water the axles and wheels are attached to the truck.
In the concluding chapter the civic official orders a squadron of bombers to wipe Fisherman's Island off the face of the earth, giving no thought that there might be other inhabitants on the island, not to say any wildlife or domestic animals, nor fish in the ocean.
Conway is murdered by having a knife thrown into the middle of his back, yet Glenda accepts his death as a suicide (and wonders why he'd kill himself before ending his suicide confession/note).