Mike:

Those coordinates appear to be the same as those in the 136 pm EDT vortex message, which I've pasted below. Presumably, the NHC took that vortex message into consideration when issuing the 2 pm advisory (which really came out around 2, I believe). I realize it's odd that the NHC did not peg the center at the same location as the vortex message, but unless you're referring to a different vortex message, I don't think it's another re-formation.

Do you have a later vortex message, or are you referring to the one I've pasted below?

URNT12 KNHC 241757
VORTEX DATA MESSAGE
A. 24/17:36:00Z
B. 25 deg 36 min N
076 deg 54 min W
C. NA mb NA m
D. 30 kt
E. 264 deg 007 nm
F. 257 deg 033 kt
G. 179 deg 008 nm
H. EXTRAP 1003 mb
I. 24 C/ 247 m
J. 25 C/ 245 m
K. 25 C/ NA
L. NA
M. NA
N. 1345 / 1
O. 0.02 / 5 nm
P. AF304 0312A KATRINA OB 06
MAX FL WIND 33 KT S QUAD 17:31:50 Z
SLP EXTRAP FROM 1500 FT.