Continuity mistake: We discover that because time is non-linear in the Further, it was Josh's spirit who was the one knocking on the door in the original film. However, the knocks we see Josh make in this film don't quite match up with the original film. In this film, he knocks many times frantically, whereas in the first film, we only hear a few faint knocks in rounds of three. (The film tries to mask this by inter-cutting footage from the first film to illustrate the point, but it still doesn't quite match up).
Continuity mistake: After Mary slams Grace's face into the table, the blood on her face keeps changing size and shape.
Continuity mistake: When Jack sets up the motorbike, he pivots the two bars forward and locks them to form the handlebars. A few shots later as Jack looks down at the sensor, you can see one solid handlebar, all the way across. (00:13:45 - 00:14:25)
Continuity mistake: When Dave is shot by Mindy while training, there are two bullet holes in his jacket when he has only been shot once at that point.
Continuity mistake: When Max hides under the pig cart, the thermal scan from the ship shows at least 8 or 9 pigs, they barely have room to turn. But when he stands up seconds later, the cart has perhaps five pigs and plenty of space around them. (00:56:00)
Continuity mistake: At the beginning, as Raimund is crossing the bridge in the rain, his umbrella turns inside out, but as it flies away to the river, it is not turned.
Continuity mistake: Billy Taggart gets invited to Mayor Hostetler's office. You see as soon as they sit down that there is a grey/black blanket with a pattern next to Russell Crowe. From this point the blanket changes in shape each time. And suddenly after a couple times back and forth shots between them, the blanket is beige/white. Than finally they switch again and it becomes the first blanket again. (00:18:40 - 00:20:10)
Continuity mistake: When Wanderer and Melanie first start to work together to escape, she walks out onto the balcony above a pool and places her hands on the railing, very close to one of the vertical dividers of the railing. The camera pans down to the pool then cuts back up to her. Suddenly, she is equal distance from the vertical dividers on her left and right, and the doors and windows she just walked through have disappeared behind her. (00:22:50)
Continuity mistake: The Counselor's watchband during the long phone call about choices, fate, and grief with Jefe changes the direction in which it is latched several times throughout the scene. It is quite prominent because it is on the arm he is using to hold the phone. (01:35:00 - 01:40:00)
Continuity mistake: When Ray drives through the fields, the headrests inside the Camaro ZL1 show SS instead of ZL1. (01:22:10)
Continuity mistake: When The Rock is putting early in the movie he is on the phone, when the shot comes back to the room the putting green is missing. (00:01:50)
Continuity mistake: After stabbing the bad guy at the beginning, Callahan for some reason pulls back and somehow dives past a door managing to drag in a grown woman who was all crouched down by the entrance. Wonky physics of it aside, the bad guy shoot at him, but shoots just a hole in the door frame. The hole appears to be CGI, and in fact when Callahan shoots back from the bedroom, the hole is gone. (00:01:35)
Continuity mistake: As El Camaleon pulls the Cuba Gooding Jr. face off, there's an unshaven neck with a tattoo visible under it. After the cut, Lady Gaga's face (also presumably unshaven admittedly, but not visibly so) comes to light under a mask of visibly lighter skin tone. (00:45:05)
Continuity mistake: Max is wearing a suit jacket while he is beating a young woman. He throws her against a dresser and then when he goes to pick her up he is in shirtsleeves.
Continuity mistake: At the beginning of the film when the girl is shot, in the close up there is no debris on her face, but the next wider shot shows her face covered with dirt and other bits of debris.
Continuity mistake: Radha Mitchell is giving a press release at the beginning of the movie. There are many microphones in front of her in rows. In the front row, from her left, are orange, black and blue microphones. In one shot from the front, another black microphone appears next to the blue one. (00:03:35)
Continuity mistake: When Schwarzy tells the helicopter pilot to "Go down!" to fetch Breslin, the helicopter gun is missing the ammo belt. (01:40:10)
Continuity mistake: When Joan walks onto the landing holding a pet bed she tells her father she's putting the bed in the guest room and you can see her hair is tied in a ponytail. However, when she then enters the room, her hair is now untied and down her shoulders. (00:21:11)
Continuity mistake: When Paul Walker bends down to see his wife's body, the clock reads 09:47, however in the next scene, the time stamp on the movie shows 09:30am. (00:13:00 - 00:13:40)
Continuity mistake: The Sheriff and Leslie have an exchange in a coffee shop. As she walks past him, he says "How's the ex? You hear from him?" While saying this, his head turns to his right as he watches her go by and he is level. The shot changes to a closer one at a side angle and suddenly he is looking down at his plate. (00:42:55)