The duel was supposed to take place at dawn. Looking at the shadows of the actors indicate the scene was filmed around noon.
When Ashton is getting dressed at West Point after sleeping with several cadets, she is wearing pantyhose under her dress. Pantyhose were not invented until the 1950s and did not exist in the 19th century.
When James Huntoon quotes the 10th Amendment, he drops "respectively" and adds "whereas"
The real 10th amendment says; "The powers not delegated to the United States by the Constitution, nor prohibited by it to the states are reserved to the states respectively or the people."
Huntoon says; ""The powers not delegated to the United States by the Constitution, nor prohibited by it to the states are reserved to the states or the people thereof."