I noticed in one of Sky's matches, that he was overcutting his shots with outside english, at least 3 that I can remember. It's as if he's overestimating his shafts deflection. He even said so himself on a shot where he missed the entire ball. Is it possible he's got a new shaft he's not used to?
What about the straight stop shot on 8 ball that he missed ? He just didn't play good...