How come there was more than 4 girls inside the bathroom?

Yeah, I noticed that too. I was going to start a new topic about this, but you beat me to it.

Instead of being four girls, there were five girls who were killed in the bathroom in this movie. VERY serious error. The number of girls killed in the Birmingham blast is so historically significant that several songs and Spike Lee's excellent documentary are titled after it ("Four Little Girls").

I realize that most movies have their share of goofs, but this one was TOTALLY unacceptable.