Continuity mistake: When Minxie sees the Creeper outside the bus window and they all hide under the seats, the lights are on. Seconds later as it stops above Jake and starts sniffing the lights are seen to be off. (Still a mistake, despite the deleted scene.) (00:36:10 - 00:37:05)
Continuity mistake: Towards the beginning of the movie, the kids in the bus are singing and you can initially see the road behind the bus and there is no car behind the bus, but almost immediately, a kid motions that a truck is coming and to hold up the banner on the side of the car. (00:08:15)
Answer: The Creeper only selected a handful of the kids, not all of them. Therefore it's safe to assume the rest made it out alive.
lartaker1975