Must be a regional thing? I live in Maryland and I don't think I've heard it not two syllables. Flor-da. I had a customer at work the other day who lives half the year in Florida. I didn't recognize his zip code so I asked where he was from amd he rolled his eyes and said "Flor-DUHHH." Which while rude is the basic pronunciation I've always heard. So...you're milage may very, I suppose.