It appears that the deal has not been sealed, much less finalized, and the Brazilian Defense Minister is saying that the Gripen and Super-Hornet. “could be still allowed to “redefine” their offers for the FX-2 contract.”

My guess is that deal was 98% done at the time of the initial announcement, and the Brazil is angling for more support, either technically or via purchase, for their C-390 transport.

Background here.