Sandy spits voluminously in Sue's face. He uses a handkerchief to wipe his eyes but there is clearly no saliva anywhere on his face.
Sue nicks the guy behind the bar twice in the face, each time with him crying out. After brief conversation, the guy reacts and cries out a third time and asks Sue to stop doing that, but Sue didn't cut him again.
When French and Sue go to collect from the Irish bloke, as he is seen from behind while speaking to Sue, his head/mouth movements do not match his speech.
During the fight scene involving collection from "Harvey" (Richard Tanner, about 25 mins.), the wall that "2 Bits" (Jamal Duff) punches and then crushes with a body-toss of "French" (Scott Adkins) is clearly a temporary, hastily built add-on consisting of balsa wood studs and two lightly tacked sheets of dry wall - that section of the set isn't even painted to match the rest of the interior, so the crew must have had to (re)assemble it quickly.
While driving to Topanga, the car is on the RIGHT lane (1h03:34 - 1h03:38), then on the LEFT lane (1h03:41 - 1h03:44) and back on the RIGHT lane (1h03:45 - 1h03:48).
When Sue and French are following Amanda on the way to locating the Irishman's apartment, they tail her in the Maywood section of Los Angeles, California. They finally get to his apartment location and Sue makes a comment how Amanda is far from home. The apartment is actually is not too far from Maywood, in nearby Vernon. While Vernon is indeed far from 'home', so is Maywood, which appears to look more like an upscale area than it is.