Could be any number of things. Have you tried posting a video in the member swings / instruction section of the forum? I did at the end of last year and a couple of the guys were a great help.
Without seeing a video it’s impossible to know.
I checked Google Maps, and it is almost 1300 miles from NYC to Miami... with the cost of gas and lodging and meals, it could come up to well over $250 one way. If you fly into Sarasota, it is $207 roundtrip from NYC, and there are probably even better deals to Orlando or Ft Lauderdale, ... You can use the $200 plus in savings to rent a car and you are about even with costs, but a lot less wear and tear on your body.
Whatever you choose, I hope you have a fantastic trip and an equally fantastic visit to the Sunshine State.