Continuity mistake: When Matrix first abducts Cindy and is talking to her in the car, both of their windows are rolled up. When she backs the car out, the passenger side window is rolled down. In the next shot, as they exit the parking garage and pay the attendant, both windows are rolled down. (00:29:50)
Revealing mistake: Just before Matrix crashes the red car there is a shot with just 1 person in it. The woman has vanished. (00:38:30)
Continuity mistake: When Matrix fires the multi-bazooka at the jeep, just before it explodes, a bunch of boxes covered with bushes suddenly appears right in front, most likely to hide all the stuff to allow for the explossions and chaos that follows. (01:08:45)
Continuity mistake: In the hotel fight scene between Matrix and Cooke, Cooke is knocked on the ground and shoves a red suitcase out of his way, and it lands near the door to the adjacent hotel room. When Cooke is knocked to that exact spot a few seconds later and grabs the gun, the suitcase is gone. (00:46:35)
Revealing mistake: In the beginning of the movie when Matrix goes to get his rifle from the shed, he uses a combination on the keypad to unlock the door but the door was already half opened. (00:12:25)
Continuity mistake: During the ridiculously overdrawn action sequence at the end, Arnie has a belt-fed machine gun which becomes lefty and righty through certain shots. Since Arnie isn't lefty, and it's unlikely that the army would just have a lefty belt-fed gun lying around, it's safe to say that the picture was reversed. (01:15:33)
Other mistake: When Arnie enters the plane's cargo hold at the start of the film, he is confronted with a black dog in a cage barking at him. As he slides past the dog it seems to pay no attention to Arnie, but seems to be more interested in barking at someone else who is out of shot. Trainer perhaps? (00:22:30)
Continuity mistake: When Cindy and Matrix are following Sully, there is a shot from inside Sully's Porsche and there is a big green what looks to be a lorry following 2 cars behind. The camera cuts and it is no longer there. (00:29:30)
Revealing mistake: During the stunt where the police van flips over (as a result of the rocket launcher attack) you can see the telegraph pole section used to flip the van over. It rolls down the road. (Stunts involving flips rely on a mini pile driver under the vehicle, as opposed to using an explosive charge by itself which can be too unpredictable). (00:54:55)
Revealing mistake: The stunt double for David Patrick Kelly is seen driving the car, just before he crashes through the gate of the parking garage. (00:37:50 - 00:40:10)
Continuity mistake: In the scene in which Matrix rams Sully off the road we see his car go up the embankment and land on its side. It lands about three feet from the embankment. Then when we see Matrix go to flip the car back onto its wheels, it is now about seven or eight feet from the embankment. (00:38:30 - 00:40:00)
Continuity mistake: When Matrix and Cindy follow Sully from the airport to the shopping mall the front license plate of Cindy's car is missing. When they arrive inside the mall parking ground it is back again. Later, when they follow Sully from the mall to the point where they intercept him, the plate is gone again. (00:29:10 - 00:30:05)
Continuity mistake: As the two garbage men are shooting the guy at the start of the movie, we see from the side shot that they are standing parallel to each other a few feet apart and they stay still as they shoot him. Then when the camera changes angles to the front shot after the dead guy falls, we see the bad guy on the right has moved a few feet forward. (00:01:50)
Continuity mistake: The police van flips onto its right side. The camera cuts and it is now on its left side. (00:54:45)
Continuity mistake: When Matrix has got the gun with an ammo feed into it, the amount of ammo left in the feed changes drastically between shots. (01:12:20)
Continuity mistake: As we see Matrix enter his gun shed, he picks up a pistol and tucks it into his pants. He then runs back to the house and kills the guy in the chair. As he leaves the house, the gun is now tucked into his belt. (00:12:25 - 00:13:25)
Continuity mistake: When Arnie is escaping from the aeroplane at the start, he has a cut on the right hand side of his forehead. When Arnie (or his stuntman) climbs out onto the landing gear, the cut is on the left hand side of his forehead. (00:23:05)
Continuity mistake: When Matrix and Cindy are getting into the plane, the guys on the docks are shooting at the plane. You see several bullets make holes on the right side of the door. Later when you see the plane, the holes are gone. (01:00:45 - 01:06:10)
Continuity mistake: When Matrix is laying on the table, and the bad guys are telling him the plan, a chain around his chest keeps appearing and disappearing depending on the angle. (00:17:20)
Continuity mistake: At the end when Alyssa Milano is standing next to Arnold, in the wide shot you can see it's him, but in the close-up of Alyssa the person standing next to her has blond hair on his chest while Arnold is well "shaved clean". (01:21:30)
Answer: Possibly so any surviving enemies they encountered on previous missions and or tours of duty couldn't hunt them down and kill them for revenge.