Fine. But they're adapting the book Anderson calls Life of Muad'Dib, so that's irrelevant.Don't you guys know? The original books aren't the ultimate authority, anymore. The prequels and interquels are.
Discrepancies to rationalization: The clear implication of these statements and rationalisations made in Paul of Dune and by Kevin J. Anderson, is that Dune is the aforementioned Life of Muad'Dib.

But yeah, that does take some chutzpah.