Other mistake: As the brown truck drives away in the scene after the man working in the newspaper office is "harpooned" by a Critter, if you look closely as the truck turns a corner you can see some Critters rolling after it. Well, after they roll past the truck in the bottom left of the screen you can see the Critters roll right smack into another parked car. Obviously the crew forgot to add a turning feature to their Critter balls (which were just some fur taped to a basket ball).
Other mistake: When Cindy's dad steps off the freshly hatched critter he lifts his foot to find a bunch of gooey green slime. Where's the fur, eyes, teeth and internal organs?
Answer: From what I recall, Charlie followed the bounty hunters as they walked away in the first film. So the implication is that they decided to let him tag along with them. (And that makes sense. After all, he helped them destroy the Krites in the first film, so he'd be useful.)
TedStixon