During the escape story, Jones mentions that the Dervishes are afraid of fire yet the two Dervishes who were holding Jones prisoner in the desert were cooking a small animal over a fire.
When Jones is burning the letters in front of Hodges' face outside, Hodges (who was also in charge of enforcing the blackout) yells put that light out because the flames are creating a light yet in the background is an open door with a light on inside.
When Jones retraces his route to fetch Private Clark, there are no footsteps in the sand.