At some point in time Mr.Truly ( allegedly) had told Lovelady to guard the rear elevators on the ground floor.
I don’t see how that could have been until AFTER Truly and Baker came back down from the roof top using the east elevator again and they stopped on the 4th floor for some period of time.
So Lovelady must not have been told by Truly to guard the elevators until after at least 10 minutes or more post shots.
So if Lovelady stayed guarding the elevators like he’s been told until Fritz showed up then maybe Lovelady operated the east elevator to take Fritz and others up to the 6th floor and then Lovelady lingered for a while on the 6th floor.
Lovelady must have taken off his red checkered flannel shirt because he was hot, and he must have stood on a box or pallet which increased his height.
Highly doubtful imo that the 6th floor shooter would be still lingering around on the 6th floor when Fritz got there, and or was a guy who resembled Oswald who is NOT Lovelady, therefore NOT an TSBD employee, because even the bumbling Fritz would be suspicious of such character and probably have taken him to be interrogated.