Other mistake: When they show the building and the people which they want to rob in the building, it's higher than nine floors - 17th floor at a guess.
Other mistake: One of the guys goes and gets supplies, and returns with his station wagon filled, and there's no tailgate - stuff would have been falling out way out there in the country.
Suggested correction: The station wagon pulls up and the door retracts...it's not missing.
Other mistake: When they push the elevator to come down it opens and they slowly load all 5 dogs. No elevator would have stayed open that long. They push all the floors, and when it stops the doors only stay open for 5-6 seconds on each floor, until the last floor where it doesn't close until the camera switches.
Other mistake: When the guys are cooking steaks for a boss or somthing like that, the dogs come after smelling the food. The man starts to clean the gun, until he sees them and he loads a sigle bullet to shot a dog, but he shoots 3 times, after the dogs run.