I have seen others remarking about that too.
Looks like:
1) The CRA is recording that the Consumer has disputed the information
2) The CRA performed the obligated review and determined that it was a valid status under the rules of the FCRA.
That records the dispute (a CRA CYA response most likely) and would most likely allow them to say further disputes through them would be frivolous. I suspect it is going to be the CRAs way of pushing debtors back into having to deal with the OC/CA for conflict dispute. Gets the CRA out of the middle of the dispute.