Depakote Levels high, should I be concerned?

My 8 y.o. daughter takes 250 MG of Depakote twice a day. She recently had blood drawn, and her blood levels were 7 points higher than the recommended therapeutic levels. Her doctor does not want to make any changes to her medication. Should I be concerned? Why do they have recommended therapeutic levels, if they aren't going to be followed? Her blood was drawn before her morning dose, so her blood levels were probably at their lowest. Also, her BUN and Creatine ratio was high, although the BUN and Creatine separately were normal, just the ratio was high. He also says this is nothing to be concerned about. This is the second doctor I have tried in this Atlanta office, and I am very frustrated with the slow response time to calls, and they act as if her symptoms, (headache, decreased concentration, poor school work, and insomnia) are new symptoms every time I call. Although, this is what we just discussed in our last visit, (2 weeks ago), and the previous visits with the other doctor. They suggest I come in with her, since "these are new symptoms". Ever feel like no one listens to you, or can't remember you from Adam when they see you? Any help would be appreciated. Thanks, Lori