You are a bit in denial.
I'm afraid you are the one in denial. I've a 7500 X 5406 copy of the photo, much better than your paltry offer, and not a slope to be seen, and also no slope is evident in the following photo of the final flight. Taken 17 seconds into the flight, approximately 250 feet distant from the end of the launching track at an altitude of about 10 feet, with about another 600 feet and 42 seconds to go.
Haraka, don't know on what basis/evidence the FAI recognised the flight.
The presence of the hill is also confirmed by this picture
Of course the hill is present, the launch point was at the right hand base of the hill.
Propellers like that appeared at the end of 1907 and this is strong evidence the photo was not made in 1903
Absolute and utter nonsense. You make a lot of assertions with absolutely no proof to back up those assertions.