Does This Make Heresy Official? Pope Francis Raises Buenos Aires Affirmation of Adultery to Status of "Authentic Magisterium"

You too can be Henry VIII and
annul your own marriage!

Pope Francis has raised his letter to the Buenos Aires bishops affirming their interpretation of the Amoris Laetitia, along with their original letter, to the status of an Apostolic Letter. He also stated this is part of the "authentic Magisterium" of the Church. The pope did this in the form of a papal rescript. Rorate Caeli explained what that is and followed with a question:
troubling document

"Rescripts are responses of the pope or a Sacred Congregation, in writing, to queries or petitions of individuals. Some rescripts concern the granting of favours; others the administration of justice, e.g. the interpretation of a law, the appointment of a judge." Rescipts generally have the force of particular law, however, as in this case, only "when they interpret or promulgate a general law, are they of universal application." Since papal rescripts answer an inquiry - could this rescript be a direct reply to the dubia of the Four Cardinals?

Rorate goes on: