When Andy arrives home early in the movie, he jumps from the convoy truck into a pretty much empty street. A couple of shots later, as he embraces his mother, suddenly the street is filled with stopped cars and onlookers.
When Andy Hardy arrives home, he jumps off an army truck with his duffel bag. When he sees his parents moments later and they start walking, the duffel bag has vanished.
A messenger leaves a note in the crack of the Hardy home, that he has a message for Andy. Moments later Andy Hardy arrives; gets the telegram and opens his house door, but the note left in the door crack has vanished.
Andy Hardy comes home from the war with a military ribbon with bronze battle stars, yet he doesn't have a Combat Infantryman's Badge.
When Andy arrives back at home today, get the telegram. He falls down, and there's mud on his right side of his face cheek. When he approaches the telegram. Man, the mud is on his left face cheek.