As a former umpire let me interject my thoughts, please?
Even if the umpires did NOT signal or verbalize the call, it is the players' and coaches' responsibility to know the situation. Yes; the call should have been made IF the blues were going to change their call later, perhaps. However, as it stands, let us say they made the "right call"; the batter was out and the runners advanced at their own risk, therefore the force play was not in effect as the batter was deemed out. Soft liners and bloopers are usually not called as infield flies as neither are bunted balls. Also, let me now say that even though I said bloopers and soft liners are usually not called, it is totally almost the umpires' discretion; especially when trying to determine if the ball could have 'routinely" caught by a fielder.
Apologies for the long-winded dissertation.