Just my opinion....I think the motive is to take the attention off of the SCRBD site. The account holder of the SCRBD site that uploaded the docs can possibly be connected to the actual forger and or Orly. Otherwise, why all of the fuss over multiple versions of forged documents?
::shrugs::
It could have been done on purpose to humiliate Orly or birthers. Remember when the internet was abuzz because it was said obama switched out the original one he placed online? Then some said it was switched again.