Last night Runners on second and third. Batter bunts. Third base fakes throw to first and both runners advance. Runner is 1/2 way to home and runner on second is now standing on third base. Fielder runs runner back to third and tags her standing on the base, while the runner that was on third starts to run back to second and she runs her down and tags her. Umpire calls runner going back to second as the only out. Correct call?