Audio problem: When Jake gets to school, a kid tells him his Good Guy doll is "cool." Jake asks if he wants to buy it, and the kid replies, "No thanks." But his mouth isn't moving. (The shot cuts while he's saying it, but you can tell his mouth isn't moving.)
Audio problem: When Jake is researching how much Good Guy dolls sell for on his laptop, you can hear a phantom mouse-clicking sound, even though he's not using a mouse.
Answer: They were blamed for the death of Jake's foster brother, which was deemed a terrible accident, and they were sent to the reform school as a punishment. Presumably, when they had to leave the reform school given what happened, they were instead given community service as punishment.
TedStixon