Sorry Cuda, wrong there. Only FedEx Air packages go through the hub. All Fed Ex ground packages go only through the transfer areas where it is required to go from point A to point B.
It is another anomaly of the government trying to copy someones "better" idea but not doing it with any common sense. (which, by the way, is at least endangered in Government. If not already extinct.).
All they would have to do to save money on items like that is automatically sort Key West Zip Codes in house and redistribute them there without leaving the local Post Office. But, the hub works for Fed Ex Air, so they won't bother to improve.