I found this Indonesian Website (why, I don't know) where you can just type in lat-longs in either minutes or decimal format and it automatically gives angle and speed.
http://www.indo.com/distance/
Key thing to keep in mind is official NHC advisories use decimal lat longs (20.5N, for example, 10 tenths in a degree) while VORTEX statements from recon are in minutes (20.5N is then 20 degrees 30 minutes North, 60 minutes in a degree.) Confusion on this point has caused infinite confusion over the years.
On that website a recon vortex is entered with a colon (20:30) and decimal is entered with a decimal (20.5).
Plugging in extremes for the seconds, that gives 11 to 13 miles distance at 282 to 290 degrees bearing. If the times were right, she just slowed down a lot.