The morning after Frank and April decide to move to Paris, Frank leaves the house wearing a dark red tie. He wears the same tie in the office, when he tells the boys he's moving. Frank's tie is light yellow at lunch; in fact, everyone's tie is different. When he gets back to the office, his tie is red.
After John Givings' tirade to April and Frank Wheeler, Frank angrily walks from the dinner table to the opposite corner of the room. In the next shot, he is standing in the corner diagonally across of the room, sipping his drink.
Grand Central Station has only allowed electric locomotives since long before the 1950s. The train Frank takes to work is pulled by an Alco RS-3 diesel locomotive, which does not have dual diesel/electric power capability.