This is only a guess, without knowing your ds or knowing what the tester found in terms of why there are large gaps in his test scores, but it looks very much like he may have a learning challenge in the mix (or possibly even a vision challenge).

Did the neuropsych report include any other information?

FWIW, if he has a learning challenge he may be incredibly frustrated at school, which in turn an feed into behavioral challenges. He may also be frustrated with instructional level due to his high ability scores.

Sorry to hear about the struggles he's having - I hope you're able to find a solution that works - let us know whatever you're comfortable with sharing of what the rest of his neuropsych eval report says.

Best wishes,

polarbear