What in the world would cause that thing to do what looked to be an S-curve over the Central Florida Area?

Frances rides along the edge of the ridge. Gaston exits to the NE. Leaves weak trof behind that allows Frances to go WNW to maybe almost NW. Trof lifts out, high pressure get a kick in the pants from the north, builds in again , causes Frances back to WNW-W again until she can find the edge of the ridge to go polar again. This plays out to a point with alot of the models, on the globals just watch to the north as the ridge builds back. This is the only way most of the east coast of FL can take a direct hit, this is almost exactly how it has to set itself up.