So, the premise to change the date by Greer was based upon Greer's ignorance on the Quinlan case. Helped along by Felos holding up a newspaper dated during the event of Quinlan being removed from a respirator. Which, as you said, wasn't when she died.
Those are errors and Greer refused to revisit them. He also refused to allow modern testing to see what Terri's true condition was and refused to allow swallowing tests that had been recommended by GAL Wolfson in 2004. Wolfson was fired by Chief Judge Demers. No tests after Wolfson recommended and no swallowing tests this year.
They just wanted to cross the finish line. Terri's file was 50 volumes and the pressure was on to bump her off.