I am so sorry to hear you were unmatched. That doesn't mean Copeland didn't want you or thought you weren't "good enough". A lot of campuses and greek systems allow chapters to take quota additions or quota plus even if they get to total providing the PNM has maximized her options which you did from you explanations of what happened. I guess your campus doesn't have this practice.
You are mirroring my rushing experience in many ways.
I didn't join until my sophmore year. Keep a positive attitude; Sign up for COR; Keep you grades up; and meet as many of the sorority members at your school as possible. Good Luck!