In the previous episode, the Legends robbed a bank on the 9th of the month but after what couldn't be much more than a couple of days it is suddenly October 24th.
Sari is cleaning the kitchen using a trigger-style spray bottle. Spray bottles weren't filled with cleaning agents until 1947 and trigger-style spray bottles weren't invented until 1968.
This is set in 1925. A federal agent asks Nate, whom he thinks is J. Edgar Hoover, if they should, "Round up the usual suspects." This wasn't a saying in 1925. It came out of the film Casablanca (1942).