When Jonathan's mom catches Bobby and her son smoking pot in the bedroom, the two teenagers are listening to Laura Nyro's "Desiree" on a vinyl player. As soon as the song ends, "It's Gonna Take a Miracle" starts playing, without any tracks being skipped. But on Nyro's "Gonna Take a Miracle" album (which features both songs), "Desiree" is on side A while "It's Gonna Take a Miracle" is on side B (it's the last song on the album).
At the end of the movie when Jonathan walks in the house, and Bobby is still standing outside. The light turns on in the upstairs window at the same time Jonathan is seen walking inside the first floor window. Yet they are supposed to be alone at the house.