It doesn't seem like L/Z decide to U-Turn M/A, at least to me. It seems like they're talking and figuring out how to use it, possibly deciding whether TO U-Turn M/A (after looking again and again at that part of the promo, I couldn't see any type of screen change from Zac pressing it) or possibly deciding on another team.
Maybe Andy's bicycle breaking helps to do them in, as I really think they'd be U-Turned. Plus, with Cindy running as fast as she can while saying, "Please let us win!" they'd be my second choice as to flush out the EP.
[/random misplaced(?) speculation]