Relax - don't worry so much. You don't want to freak out your DD. Remember that 75th percentile two grades above is not really much for even a moderately gifted kiddo, particularly when they are only requiring 3 out of 5 subjects. It's not a linear distribution, if you look carefully at charts for Explore or MAP, etc. For example on the MAP, a 99th percentile for math at 4th grade will be 75th percentile at 7th grade while a 99th percentile for reading at 4th grade will be 75th percentile at 11th grade.

Good luck!