Revealing mistake: When C-Note leaps out of the train, you can see that the man jumping out of the train is a stuntman. He is much chubbier than C-Note (wearing a life vest) and his face is completely different. (00:22:20)
Character mistake: When C-Note is using the woman's computer on the train, the Army website says "Access my be denied to some parts of this site" instead of "Access MAY be denied." (00:21:00)
Continuity mistake: As the trio walk towards the ranch, the car is parked next to a pole with a small metal sign attached. (This is not the private property sign that is located on an adjacent post). In the shot from the top look down at the trio the small sign has disappeared. (00:38:50 - 00:41:10)
Answer: Don Self actually worked with Whistler before he died. And Whistler with the bird book actually knew where Scylla was.