Garaad diinle
I was about to say that but you also noticed the fallacy. There were a number of copies of the futuh in northern somalia galbeed and the shewan plateau, who's to say which of these manuscript the egyption scrip used in his copy. These copies are meant to be compared to one another instead of choosing one of them as an authoritative source based on it's age.One primary point that would strengthen your case is if the corrected one copied the one you used, not an older source.