Am I missing something here?

[mkuk]

Last night in our game runners on 1st and 2nd, nobody out. Batter hits a pop up between home and 1st. No communication between defense, home plate umpire calls infield fly, ball hits 8 inches fair then rolls into foul territory before being touched by catcher. Home plate ump calls batter out! When asked why he stated fair ball. When asked how, it landed in fair territory. Very frustrating!