Continuity mistake: When Cuba is driving in the Beetle with the skunk, the skunk is in the back walking around on the platform under the back window, but we cut to Cuba with a clear shot of the back window, and there is no skunk. Yes, Cuba's head is in the way a little, but that is a big, bushy skunk. Plus in the next shot they show the skunk again, and it wasn't in the place where Cuba's head would've been hiding it.
Continuity mistake: After Ted has rescued Jack from the cave, Jack is strapped to the sled and Ted is on the back, with both Nana and Demon as the 'lead dogs' (Jack's dogs are also attached to the sled, but this is irrelevant). In one shot, Nana is on one side, Demon on the other, but in the very next, their positions are flipped around. The ganglines make it impossible for the dogs to do this (cross over) whether they are stationary or moving, so it could not be that Nana merely decided to run on Demon's other side, or vice versa. And even if this was possible, you can see perfectly well that the lines are uncrossed and untangled; totally fine.
Continuity mistake: When Cuba is driving the beetle, there is a skunk in the back. Well if you continue to watch out the back window, you can see that it changes from the town to just trees. It switches a couple of times.