The Problem:
Miles appears to be separated from his classmates.
The Solution:
Many, many solutions. The simplest being simply aligning everyone to the right side of the risers. Perhaps maneuvering him in front of the risers and going for a tighter shot.
The Cause:
It all boils down to training. School-hired photography companies almost exclusively hire highly inexperienced photographers. These guys have little to no experience and are sadly mistaken if they think they will be getting much more. They usually have to go by strict formulas as well. Sometimes it's as strict as having a mat with the locations of the lights and camera marked on it. This is tolerable if you consider that these companies sometimes need to take hundreds of identical pictures per day, but it has an added consequence: the photographer a) does not expect any variation, b) is not trained to handle any variation, c) does not have the experience to handle the variation themselves.
Let's be fair with this guy. Yes, he's a crappy photographer, but he's also probably very inexperienced. He followed his training to the best of his ability. Trying something crazy and unexpected is unheard of for him, and it would possibly mean abandoning protocol
The solution that was provided was actually one that the photographer never could have done, even if he were more experienced. "In the new photo, which his parents have not yet seen, Miles was taken out of his wheelchair and supported by a caregiver on a bench beside his classmates." Supported by a caregiver. Was the photographer supposed to not only abandon all of his training, think outside the box for the first time, come up with a solution to a problem which he had never experienced in any form, AND pull a certified caregiver out of his butt in order to make this photo the best it could be?
This is a picture of a happy kid. He is further from the group than he could have been. He probably considers himself a normal kid, but his mother has singlehandedly drawn much more attention to his condition in one day than a lifetime of slightly separated school pictures.