Not massively incorrectly, but still wrong enough to cause a serious compromise of the seat's safety in a collision. The precious children I've been buckling up so carefully all this time would have been little more protected from injury than if I'd let them crawl around, bouncing from seat to seat the way our own parents let us. I was especially alarmed because the two seats in my minivan were brand new. I even called the manufacturer's 1-800 number to make sure I truly understood the installation instructions. Still, my children's car seats failed the test.
Small people sit in back.
The safest place in the car is the back seat, regardless of whether the passenger side of your front seat has an air bag. If it does, however, and you install your safety seat there anyway, you're playing Russian roulette with only one chamber empty. Never use a car seat before you read the instructions. Car seats are frequently incompatible with the seat belt systems in cars. The only way to know if the seat you've selected works with the car you drive is to read the manuals that come with each.