I’m sorry you didn’t get the news you were hoping for. It doesn’t look like Miami admits a lot of students from the waitlist; but if Miami is your top choice, be sure to contact your admissions officer to express your continued interest. Mention the double legacy and why in particular you want to attend. Send them your first semester grades if they don’t already have them and they are good and mention any new awards or activities you’re involved in. Can’t hurt and it might help. Then focus on the other schools you’ve applied to and choosing the best one for you. There are lots of great schools out there!