That's the real answer. There is nothing more to it than that. But that answer can't suffice from Tai_Chung's perspective. The Bible is supposed to be the Infallible Word of God, literally true in its every particular. What those two verses demonstrate is that if you take such an extreme position, you're left having to believe some pretty silly stuff.
I probably shouldn't mention that the sign hung on Jesus's cross is worded differently in the four Gospels. ;^)