You don't need to send it to them. If you wait, you'll get an email from them, telling you that they received your application. And then they'll direct you to another website, that asks you to fill out some supplementary information. After you fill this out, you will have the option of paying online via credit card. Much easier than mailing it.
Yup, yup. I wouldn't mail it until you get the email with the directions. There are also some additional required documents so you might as well either mail them all together or do everything online.
Out of curiosity, what additional documents did you have to send? Was it stuff to indicate you were a resident of FL? I don't think I have to send anything but then again, I'm not from Florida.