Well, I would definitely recommend getting some other kind of safety schools on there! I imagine UF is your current one (Hi fellow Floridian? Maybe?) but it's always a good idea to have a few more safeties.
I think all of us have fears about list-wide rejection letters. I'm happy with my current list, but I think I'll be adding some more backups if come Dec 15, my Stanford SCEA is a reject.
I'm afraid to say I don't know anything about UMD

But good luck with everything!