I understand what you are saying.
However, if you look at the way Sebastian is standing in the trophy picture, for example, the positioning of his feet may also appear awkward or unusual to some.
One certainly cannot paint kids on the spectrum with a broad brush, as there is great variance, behaviorally, between children (hence the term, spectrum), but, I have found (being the parent of an ASD child) that some kids on the spectrum may use a different gait when they walk than many, if not most, neurotypical children, have a different resting stance, etc.
So, while others may have seen this portion of the photo & thought it immediately to be an oddity, it didn’t pop out at me, personally, as being strange or unusual. Just my thoughts and opinion.
On another front, the shoes the child in NC photo is wearing do look like shoes Sebastian has been known to wear/is wearing in the photo with the trophy (e.g. brand, style, color).
All MOO.