We are supposed to believe The Great Massacre of 1955 took place on a single day. We see Willie Cicci murder Carmine Cuneo in the revolving door of a hotel. But later on when Tessio arrives at the Mall to meet up with Michael for the meeting with Barzini on Tessio's turf in Brooklyn -- where Michael would be killed -- he is stopped by Corleone button men, among them Willie Cicci. Cicci, who first killed Cuneo earlier that day, is now wearing a different suit and it's therefore reasonable to assume many hours have passed.
The question is: how could Tessio not already have been informed about all the killings that took place? Did news travel that slow in New York in the mid 1950s?