What's she reading? Have you given her anything like an AR test, or has school? Has school tested her reading level?

How about a bit more info on math? Can she add and subtract multidigit numbers in her head, do fractions, multiply and divide multidigits on paper? If you sat and gave her an out of level math test, with zero help or prompting, how would she do? I think you could use the K-12 tests online (someone else probably has the link).

In your shoes, with these results, which, yes, really don't look that spiky, I'd be really confused. I'd want to see how the child performed right in front of me on a neutral paper and pencil test, but with me watching. Maybe there's an anxiety issue? Dysgraphia? What is she expected to do in K? How much does she write?