The front door opens out toward the yard when Mr. B gets home and finds box springs blocking his way inside. The door shows correctly opening in toward the house when the neighbors go home after dinner.
While Hazel is speaking with Harry's wife in Mr. B's den, the door is clearly open behind her. Yet Mr. B and his wife are shown at the same door, (closed) eavesdropping on the conversation between Hazel and Harry's wife.