(Phil setting up the hit)It's extremely possible if it was on the same day.(Phils death and Tonys family night out.) Phil and Butch are speaking on the phone when Butch suggests reaching out. He says sorry your breaking up, now we well know that Phil could still hear Butch, but just like the guy that took the food from his plate, Butch has now offended Phil. Phil is the type to kill his own family if he felt betrayed enough. (Vito) It's extremely possible when you think about it.
Especailly if the man was from Italy, as the orders go through a middle man and are not negotiated directly.