Hi Miriam,
Thanks as always! You were on the right track. The two businesses that we own are completely separate (law firm and a title company). I eventually found out how to add officially add suites to our office building, so we should be good for now. Oddly enough, in Florida (or at least, in this county) it's not done through the post office (which is why I was so puzzled). You have to go through the "Geographical Information Services" department to get the forms...no, I never heard of it either.
Happy Friday and, once again, thanks for the response!
- Ruben