During the scene in which the twins are playing basketball with a young man teaching them the jump shot, the young man says "That's how Magic Johnson won back to back MVP's." However the timeframe of the film is 1985 and Larry Brid had won back to back MVP's in 1984 and 1985 and would win the following year. Magic Johnson didn't win the MVP until 1987.
The US flags in the first gym are backwards. When displayed vertically against a wall the field of stars should be on the flag's own right, the observer's left.