Point 1--Barr said he made Durham a special counsel in October, not today.
Point 2--This affords Durham special protections so that he cannot be fired by a new administration, similar to how Mueller could not be fired.
See Barr appoints special counsel in Russia probe investigation
Trump needed to officially look very separate from the DoJ and FBI. It worked so well people are on fainting couches all over FR, clutching their pearls, and preparing their bowls of hemlock.