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.
At the end of the movie they were playing against each other in the WNBA. Infact Heidi played in the WNBA in 1997 with the LA Sparks and 1998 with the Washington Mystics. Heather played in the WNba in 1999 for Sacramento Monarchs. They were never in the league at the same time.