Sorry, can't offer any advice to the bulk of your post but just a thought regarding the WISC IV results.

My son was tested a number of years ago using the WISC III. Are the subtests in which your daughter scored lower the ones that use speed for bonus points? Does the WISC IV still use these type of subtests? If so my son had a similar outcome. He reached the test ceiling on all of the subtests except the 3 that use speed. In our case the psychologist explained it was due to the fact that he would check over his work before looking up. She also stated that these types of tests disadvantaged children who were impulsive and therefore likely to make mistakes when pressured. Maybe something to think about.

I hope this helps.
matmum