Here's what I suggest, in this manner I've managed to satisfy myself that my MS is in fact on the Jingu Maru, left Southhampton on July 19th..
Go to the shipper's (Wallenius Wilhelmsen) web-site (I think it is www.2wglobal.com,
I'm barred from accessing it on this particular computer I'm using right now). Find the link to cargo tracking, select "auto". Then, fill in your entire VIN (might not actually need the whole thing, but at least this will work). Then, you'll get a screen that will show several columns. As I recall you'll see your VIN, a booking number, a bill-of-lading number, a ship name, a voyage number, a "status" field, a time field,.... Now, when I do this, I get to entries, or "rows" each one has my VIN, but they correspond to two different voyages of the Jingu Maru - one that left Southhampton I think on 6/21/03 that my MS was "on" & "off", then the voyage that left on 7/19/2003. I only became convinced "I'm" on the 7/19 voyage when I took the bill-of-lading number for my VIN for that voyage, then used the track-by-bill-of-lading option. Using this tracking option, I came upon a listing of, oh, about maybe a hundred (or at least a few dozen) Minis on this voyage under that "bill of lading" - it actually shows to the minute the time each Mini/VIN was loaded on. Interesting, as I surveyed this list I found: my VIN indeed is there, it is by far the "lowest" (i.e. earliest manufactured) of this batch, and it appears to have been the very first Mini loaded of this bunch (loaded at 10:10 on 7/19/03, next one about 10:15, last one around 15:00).
So, try that route. You certainly will not get any better or more current info from any official Mini website, nor from 1-866-ASK-MINI, nor from your dealer (at least such was the case in my investigation)
Hope you might find the answer your looking for. If not, I can only sympathize at the bit of random "bad luck" that winds up botching the manufacture/delivery flow on certain orders.
(the reason, I learned, for the "on & off the boat" phenomena is "over-booking". It's not entirely clear to me, but I think the vehicle probably does not actually get much of the way "on" the boat, but it's rejected in much the same way airlines over-book certain flights. Once over-booked in this way, by all justice, it should have been shifted over to one of the other two boats making the same trip - the "Carmen" or I think it was the "Electra". I know that several other over-booked Minis in my original bunch were handled in this way - they're at my dealers right now!)