My understanding of the MAP scoring system is that a score of 240 would indicate that if 11th graders were given the same leveled test your DD took, 85% of them would score a 240. It doesn't necessarily mean she's reading at an 11th grade level.

This test is also has different stairs in it and it is quite possible to hit a ceiling with the exam.

I'd pursue some other testing if you do not feel you are getting the services she needs.

Boys age 7&9 grades 2&4.
SW Washington State (near Portland, OR)