Continuity mistake: When escaping from the MPS, Allen leaves Kornbluth alone on the street. The passers-by behind the car are inconsistent depending on the shot.
Continuity mistake: Kornbluth steps off the car to distract the MPs. When he kisses Madison goodbye you can see the wall behind has no basement entrance. When the MPs are about to run him over he jumps away and goes through a door that has suddenly appeared.
Continuity mistake: At the beach, Walter and one of the twins carry a box and are inches away from the boat. Half a second later, when the angle cuts to Allen asking the other twin, the first couple is standing behind, far from the boat, holding the same box and repeating the previous movements.
Continuity mistake: When Allen has dinner with Madison, his glasses of wine and water are far or close to each other, depending on the angle.
Continuity mistake: Freddie crashes his car against some wooden boxes. The way they are left changes in a matter of seconds with no one touching them.
Continuity mistake: When Allen first sees Madison on the beach, her hair is nicely crimped. But when she steps forward and kisses Allen, her hair is completely straight.
Chosen answer: Whilst it may be a tad unusual, each system serves as a back-up for the other.
David Mercier