Division is Cal Ripken Majors (ages 11-12, 70' bases, 50' mound to plate). Here is the situation:
Top of 6th inning (last), visitors trailing 8-6, two out, runners on second and third. Batter hits grounder back to mound, pitcher throws over the head of first baseman, and out of play. Both runners score, and batter awarded second base. Defensive team calls for appeal play on "one of the runners", claiming that home plate was missed, but does not specify which runner. Home plate umpire then makes out call and ends game. Offensive coach protests that since the runner was not specified, umpire could not know which runner appeal was being made on...as such, improper appeal was made by the defensive team, nullifying the entire appeal. Official protest is filed by offensive team.
What's the ruling?