I'm confused as to how this made it all the way to the Supreme Court. It seems pretty cut and dried to me in that the test results should not have been thrown out. Am I missing something?

I am definitely not a Sotomayor fan, but I don't think that has colored my viewpoint on this.
Was the content like the professional exams, where they're based on things you were taught in school and learned on the job? Or are they more like the HS standardized exams? I know there's an alleged class/race bias on those tests, but I know that there aren't any in the other professional exams.
I couldn't find this in any article, but was the content determined to be biased against the minority candidates? Was the testing information widely available for review and practice?
I mean, I have exams I have to take and pass in order to become registered. If I fail one, just because I'm black doesn't mean that they should throw out the test results for everyone.