First of all, good luck to everyone applying this year! I'm a second year here at UM and absolutely love this school! Please feel free to send me any questions that you may have, and I'll try my best to help out.
The way I see this is that you should look at the secondary as an opportunity to tell the AdCom about all the things that make you an awesome candidate! Remember, when it really comes down to it, you are your only true advocate in this application process, so it is your job to sell yourself to the AdCom and make them see why you are a good fit for their school (of course, this applies to any school you apply to).
I think that any school, including Miami, would view this favorably!