Their tracking updates are almost 3 hours slow in some cases. There are flights from Louisville to Jacksonville, like this one
UPS1322 from the history it looks to be an early morning flight, typically. More than likely yours will make it out on the next one out.
AND
Local handling tends to be much more rapid as there isn't the same volume as there was in the bulk shipping stages. Mine took only 26 min to get unloaded, scanned, sorted, scanned, and loaded on to the truck to the final sorting facility.
Miami, FL, United States 10/09/2013 7:35 P.M. Departure Scan
10/09/2013 7:09 P.M. Arrival Scan