Football organizations such as the ACC aren’t always right. I can see the video myself, and see that the evidence isn’t indisputable as required by the rules.
And besides, the ACC is throwing the kitchen sink at these guys, rather than any one call. Apparently UM wasn’t happy with them either on other calls that favored Duke. From what I’ve read they were on UM’s list of referees they didn’t want officiating the game.
So do you think the ball isn't in his hand in that picture, or that his knee isn't on the ground?