Nope! Ms Arnold's sighting of Mr Oswald in the second floor lunchroom several minutes before the P. parade means he was in the second floor lunchroom several minutes before the P. parade. After that he went back down to the first floor to eat his lunch, and then went outside to watch the P. parade. Just like he told Captain Fritz!
The other two witnesses to the same interview clearly wrote that the 2nd floor lunchroom encounter happened first, then Oswald went to the first floor to eat...And then he went outside to the front...
The Hosty notes above loosely correspond to the same sequence so it is reasonable to assume they also cover the same chronological context of beginning with Oswald being in the lunch room when he had the Coke...
The reason all three notes begin with the lunch room encounter is because they are avoiding mentioning that Oswald was in the same 2nd floor lunch room during the shots...
Ford has Oswald following Arnold down to the front steps after their lunch room encounter...Can't be because the 2nd floor encounter with Baker is true and Ford's making it up as he goes along scenario requires Oswald to be out of breath as he gets back up there in front of Baker...