On your first point, you'd be veering into original research by adding qualifiers from sources that do not mention this study or come from it (and the study did not say it was rape, you did).  That written, let's see what you have in mind as a qualifer including the source. I'll add that when you look at other categories of assault like touching (nearly twice the reported rate vs. penetration), the "not serious enough" reason goes up to 75%.  On your second point, the section is not just the AAU study but recent campus surveys.  So Kentucky presents another study at a college (with a better sample size at that).  If you want to make it easier to compare, then you can add the combined Male/Female assault rates to the AAU study section.