After the finale dancing, Peggy is seen removing her necklace (with help from the red headed actress) then handing it over to one of the chorus girls who asks her if she's going to the kids' party.
At the train station, when Marsh says, "It's not easy being fired," his lips don't match the audio.
Sawyer goes to Philadelphia Broad Street Station to take a train to Allentown, PA. Broad Street Station was a Pennsylvania Railroad terminal and the Pennsy did not go to Allentown. To get to Allentown, Sawyer would have had to go to the Reading Terminal.