Users as Dealers have a couple in-game controls, like manual card flip, skipping and returning to stories, and they have a control for re-voting called Reset. If they hit the Reset button, all cards return to user's decks and everyone can repoint. 

If the Dealer doesn't want to reset for a revote, say, if the team comes to a conclusion in discussion, they can Edit the Current Score (calculated score) area to reflect any number of their choosing.