Continuity mistake: When Stark is separated from the group and is attacked by the tiny dinos, his last desperate attempt at escape shows him going down a small stream, then over a log, where he falls and is killed. In the next shot, we are looking at the same log from the other side and bloody water is moving down stream with Stark's body on the other side. He can't be on both sides of the log at the same time.
Factual error: When Eddie is pulled from the car, it zooms forward and goes over the cliff. In reality this wouldn't happen. Right up until his death, Eddie had the car floored in reverse. Once he took his foot off the pedal the engine would have stalled. If a car is in gear and the clutch isn't depressed then the wheels won't turn (especially on wet mud!) The trailer would have had to drag the car but the wheels are shown turning freely.
Suggested correction: One of the T-Rexes has his (or her) foot on the car when Eddie is pulled out. The car could have been in neutral for a long time (accidentally), then when the Rex lets go the car is dragged.
Whilst what the guy above said is a possibility, he'd pulled the trailer up aways so there was no reason why the trailer just fell in a matter of seconds. It should have just started sliding again like before the car was even attached to it. So even ignoring the car the trailers shouldn't have fallen that quickly.
The jeep was able to hold the trailer in place without reversing for a short while. But eventually Eddie had to reverse to keep it from going over and even manages to pull it back a bit. When the car went into neutral and the T-Rex lifted his (or her) foot off it all the pressure and weight holding the trailer is gone so there is nothing to stop it from falling over. It had already slid quite a bit and the reversing was the only thing holding it, until the foot came along. With that gone the trailer just plummeted, not sliding anymore since there was nothing holding it anymore.
I think you've missed what the OP is saying. Before Eddie attached the winch to the Fleetwood (trailer) it was just sliding slowly and was doing for about a minute before he even attached the car. Once the car was attached it started dragging the car as it slid further off the cliff. The problem here is like the OP has stated, Eddie had pulled the FW back up a fair way. We see a tire go back up onto the cliff and get punctured in the process, it then cuts to an inside view from the FW and we can see it creeping forward slowly. When Eddie is pulled from the car, the FW drags the car off instantly, but in reality that wouldn't happen. Completely ignoring whether the car was in gear or not, the FW had been pulled back up a few meters. It would have slowly started sliding again and would have dragged the car like it did before Eddie got in and started reversing. Once the weight over the cliff became too much, only then would it drag the car off at the speed shown in the film.
Continuity mistake: When the woman in the city is yelling and drives in reverse to avoid the dinosaur the streets are empty. A shot later they're filled with people and cars driving around.
Continuity mistake: When the dinosaur rampages through the city the inside of the bus is fully lit, but right before the dinosaur attacks the inside is dim and dark. When it drives through Blockbuster it's back to fully lit.
Continuity mistake: The dog walks 2 meters towards the edge of the pool, but when the shot changes and the dog returns to his kennel he's just half a meter away.
Continuity mistake: When the dinosaur is trying to get inside Malcolm's car by making a hole with his nose, the hole is smaller in the angle shot from behind.
Continuity mistake: When Stark falls on the water, before he is bitten by the mini dinosaurs his shirt is soaking wet. In the close-up it's dry.
Continuity mistake: When the T-Rex growls by the window, Harding turns around away from the window and yells. From the opposite angle she is facing the window and her mouth is slightly opened.
Other mistake: When they have the baby Rex and the parents approach for the infant, there's an outside shot of the T-Rex roaring as Ian moves away to the other side. After he does that the Rex on the other side silently roars, then that same roar bit is repeated from inside the trailer in the very next shot, but the roar is added in, showing repeated takes.
Continuity mistake: The tent scene in which Sarah and Kelly are sleeping, wrappers from cookies or food are in the first shot. When the angle changes the wrappers are gone, but Sarah hides the reappearance of the wrappers in the next shot. (01:18:50)
Revealing mistake: When Stark is being killed by the pack of Compys, the "blood" that flows down the stream is obviously a computer generated effect. It looks nothing like liquid at all.
Character mistake: When he rescues the baby T-Rex, Nick says that "she" has a broken leg, but for the rest of the film, the dinosaur is referred to as a male.
Other mistake: Immediately after the T-Rex breaks out of the facility into San Diego there is a panning shot into a cabin room, which is filled with people, none of whom are showing any reaction to the T-Rex. (01:47:10)
Revealing mistake: When doing the scan on the T-Rex leg it's clear the Doppler isn't touching or even facing the dinosaur, but an image is shown on the screen.
Audio problem: When the light towers are running in the base camp, the lights are on but the generators running the light can't be heard running. They look like AL4000 Terex list plants, diesel motors on the generators are super loud.
Continuity mistake: When we first see the remote for the cargo hold doors in the dead man's hand, the cord goes to the viewer's left and loops under itself. In the next shot the cord is going to the right and next to the ground so it can't loop under itself. In the next shot, the position changes again.
Continuity mistake: When Sarah screams in the camper when the T-Rex is by the window, she leans against the metal post with her back flat against it. We see a shot from outside and she's still screaming but doesn't move. The shot goes back to her in the camper and now her back is against the corner of the post.
Visible crew/equipment: In the trailer cliff scene when the rope comes undone, all three actors fall towards the bottom and certain death. The actor/stunt man to the right is harnessed and, to top it off, his hands never grab the ledge. (01:02:40)
Continuity mistake: When the girl meets the mini dinosaur she is standing on the sand, parallel to the edge of the grass. A frame later she's half a meter away, perpendicular to the grass. (00:02:50)
Continuity mistake: When Dieter Stark is about to taze the dinosaur, the guy with the long beard approaches him, telling him what it is. As the bearded man says "They're presumed to be scavengers, like jackals", Stark's taser is closed mostly inwards. In the next shot, the taser is suddenly extended, opened out.
