Other mistake: When Carl has received the Nassau bank account number from the drug dealer on the phone, afterward you see him typing in "Rita Miller" on the computer. If you watch closely, his left hand pinky never touches the "A" key on the keyboard, yet the "A" in Rita comes up just fine and out of sync with the clicking sounds of the keyboard.
Other mistake: When Molly and Sam are "dancing" to the jukebox playing Unchained Melody by the Righteous Brothers, the tone arm is shown dropping onto the record at the start of the music. When the song finishes, the arm is still at the beginning of the record and then lifts off, as if the reject button was pushed before the record played.
Other mistake: In the restaurant scene, when Oda Mae and Sam are trying to convince Molly of Sam's existence, Oda Mae is prompted by Sam to reply "Ditto"as Molly turns to reply, Oda Mae is about to say something else and Sam motions with his hand for her not to say anything...Oda Mae isn't supposed to be able to see Sam, so why did she stop?
Other mistake: In the ending credits, it lists "cemetary ghost". It should be spelled "cemetery".