Character mistake: At the rehearsal dinner, when Steve walks up to Miranda she calls Steve "Dave." Dave is his real name.
Character mistake: After Father Flynn has completed his first sermon, Donald Miller comes into the dressing room and says "That was some sermon, Father." Flynn then says "Hi Jim". Jim is the name of the other altar boy. He should have said Donald.
Character mistake: When Alex Stillman is facing Karen 'Razor' Jones for the second time in the film he calls her All-In with Pocket Queen's in his hand whilst she has AJ of Spades whilst the cards on the table are: Ten of Spades, Jack of Hearts, 2 of Spades and the King of Diamonds. However the commentator then states that either a spade, Jack or Ace will cripple Alex but that is not the case as an Ace would give him a Straight and she would only have 2 pair Jacks and Aces.
Character mistake: In the scene at the sleepover Claire says she bumped into Chris who has 'shaggy blonde hair and blue eyes' and Massie gets mad because she likes Chris, but when we see him before and after he has brown hair and brown eyes. (00:40:00)
Character mistake: When the young boy is attempting to hack, Marriage Registry is spelled Wedding Registery. (00:10:56)
Character mistake: When Erickson is telling Strahm that he no longer has any jurisdiction over the Jigsaw case, he mentions that over a dozen dead bodies were recovered at the meat packing plant, including two cops. There were in fact only 10 dead bodies: Danica Scott, Judge Halden, Timothy Young, Jeff Denlon, Lynn Denlon, Jigsaw, Amanda, Art Blank, Officer Rigg, and Detective Matthews. (00:20:28)
Character mistake: When Leon goes to see Susan Hoff with his photography portfolio she tells him he needs improvement. After she leaves, Leon tells Jurgis that he thinks she hated his work and Jurgis tells Leon "when she hates somebody's work she gives them about a minute, you got three." In reality, she actually did give him one minute almost to the second. (00:06:58)
Character mistake: When Sam pushes Freddie off the plane, his mother puts on the parachute and jumps out as well. She is in such a hurry, that she doesn't buckle the straps across the front. In real life, as soon as the parachute is deployed, the resistance would cause the parachute to come off and she would likely fall to her death.