It does look like all the deficits are in basic skills and fluency, mainly calculations and spelling (that likely affected the sentence composition score, too). But his math problem solving and written expression appear to be otherwise intact.

I would disagree that he is on grade level for math. He is on grade level for math calculations, and above for math reasoning. But the calculations are holding him back from demonstrating (or accessing) higher level math problem solving skills.

...pronounced like the long vowel and first letter of the alphabet...