The alleged Flyer III 1905 and and the May 1908 plane were identical so the 1905 pictures showing Flyer III in flight could have been made after May 1908.
The site
Home Page for the Wright Brothers Aeroplane Company and wright-brothers.org states that:
"When flying the Flyer III in 1908 with upright seating, the brothers had devised a new control system with three separate levers for wing warping, elevator, and rudder... ."
Source:
1907-1909 Wright Model A
In conclusion, the May 1908 plane was the same machine as Flyer III with some minor modifications that could have been reversed anytime for a session of fake 1905 pictures.
If the Wright brothers flew the alleged 1905 plane in 1908, how can we be so sure the 1905 pictures (published for the first time in Sep. 1908) were really made in 1905 and not in 1908?