Powell slashed at Seward's aide at the bottom of the stairs, yet he actually slashed the clerk from the State Department in real life.
The narrator says "The attacks are set to take place at the same time; 10 pm." According to some accounts, the set time for triple attacks was 10:15 pm.
When the narrator says, "At the same that President Abraham Lincoln was struck down," Lewis Powell knocked at Seward's door, but according to some sources, Powell knocking at the front door of Seward's house happens when Booth was preparing his mission to shoot Lincoln at Ford's Theater by making his way to the box.
The narrator says "Powell pushes past by several of Seward's aides" yet the African American maître d' named William Bell answered the door.