For your reception situation a channel surfing friendly way to receive the Philadelphia and New York City area Tv stations.
Is to install 2 Separate antenna systems that will not be connected together on to the same coax.
The 2 separate antenna systems will be 2 separate HD7084P antennas and 2 CM 3418 distribution amplifiers and 2 separate coax systems that will go to the Tv locations where a Remote Control A/B antenna switch will be at each Tv location to select the 2 separate systems. This set up is channel surfing friendly , push the buttons on the hand held remote control change antennas and keep on surfing.
http://www.radioshack.com , # 15-1968 , or ,
http://www.mcmelectronics.com, # 32-4425.
And this 2 separate systems is friendly for every one. No disagreements that will happen if 1 antenna and a antenna rotor is used.