When the boys are checked by the medic, they state they have mild concussion. They are then sent to bed.
You should never send a person suffering from concussion to sleep so quickly.
During the voice-over introduction, right after Clark/Superman mentions moving to Metropolis, an overhead view of a highway and city streets are shown with people driving on the left hand side instead of on the right, as is in the United States, where Metropolis is based.
While saving Jordan from trouble at the bonfire party, Jonathan says he had to randomly DM numerous people to find out where the party was, but earlier when they were in the barn with Sarah, right before their accident with the poles, he was well within earshot when Sarah told Jordan about the party and invited him to come.
When the boys enter the basement in the barn, they went looking for flashlights. They both have cell phones, which have flashlights built in, as every teenager knows.