Miami has been fun for me also. I tried flying from Miami with hand tools in my carry on. TSA regs state hand tools 7 inches or shorter are allowed but final decision rests with the TSA officer. I've flown several times with the same tools. Miami TSA screener told me I could not have them in carry on. I didn't want to pay $35 to check a bag, so what were my options? Remembering my TWIC card is issued by TSA, I told the screener I have a TSA security clearance card and gave him my TWIC.
His supervisor quickly cleared me with the tools and told me to have a nice flight. It was kind of funny.