When the neighbors go over to talk to Les Goodman about his car starting, as he walks onto his porch, you can see his address is 321, and there is a porch light. When he starts to explain his insomnia, you can see there are just holes on the front of the house where the address and light were. Then, as night falls and his wife brings his a glass of milk on the porch, the address and light are there again.
When Claude Akins tries to start his car, Jack Weston is at the end of the car. A young girl walks to and looks in the passenger window. When the camera angle changes, looking through the driver's window, suddenly Jack Weston has replaced the girl looking in the passenger window.
After all the power goes off, Steve tries to start his car. The starter can be heard turning the engine over. But, with all electricity neutralized, the engine shouldn't even turn over, much less start.
The street sign in the beginning is all wrong, it faces the camera rather than the street where the story takes places. In a typical American city, street signs are almost always placed in the direction of the street they are indicating, so traffic on the other street in the intersection know what they are turning onto or passing. In other words, the story is not set on Maple Street. Maple Street is the intersecting street at the end of the road the story is set on.