Tip:
I am inclined to ask the same questions you raised, I fact I did earlier this AM when I noted the same thing noting the erosion of the high and the development of what looks to be SW-NE momentum immediately west of the Yucatan.
In addition IF this is now on a NW heading will it ever touch the Yucatan, and if not what is there to keep it around for a day or two...Some of these models have it on Cancun for up to 40 hours...
If the Jet has completed its runs the 18Z runs should have the data you suggested may need to be ingested by the computers...
I think the puzzel will be solved with these next two runs...