Three people on the fifth floor heard the three shots and the three pieces of brass hit the floor. No one is disputing that shots were fired from the sixth floor. The point in question is WHO fired them. If Oswald was the man standing in the entry at that moment, it could not have been him.
Of course, that may bring up another question... If Oswald WAS standing in the entry and witnessed the President of the United States just being assassinated, WHY would he have gone back into the building to buy a coke????
Lovelady said he was in the doorway for the entire motorcade. He was surrounded by his co-workers. The picture shows Lovelady when you look at the side by side comparisons. If's pretty silly to argue over a shirt when the faces are entirely different.
If you think that it's Oswald, find a sworn testimony from one of the co-workers that claim it was Oswald or post the side by side comparison and look for yourself.