In the case of Facebook, a multi-billion dollar company, it seems amazing that someone can come out of the woodwork and with a little effort in document tampering cause such a hullabaloo. It seems like too important of an issue to be inpart determined by "spacing, columns, and margins of page one of the Alleged Contract."
Of course, I don't know of a better system, just that the current system seems archaic. (You probably couldn't create a centralized "contract bureau" in the federal government, because many contracts are private, until someone sues.)