Before Bruno, the New York Bosses kept a tighter "grip" on the head of that and many of the other smaller Families. I know that Philly had connections to Vito Genovese and Albert Anastasia. During the Castellamarese War, they shown allegiance to Salvatore Maranzano. Joe Ida was connected to Vito Genovese. I am sure on some level Don Vitone was using Ida to position himself better. Once Bruno came to power, Gambino loosened the grip on Philadelphia. Hence, Bruno's Commission seat.