Yeah, he just doesn’t want to phase out the mandate at any time into the future:
http://www.redstate.com/diary/freedomrepublican/2015/03/18/in-his-defense-of-ethanol-mandate-flip-flop-scott-walker-rejects-constitutional-government/
I notice that when they got to the grist of what they are accusing him of saying they didn’t quote him.