Yay! There are lots of us in J-P!!
Enjoy the ride: if you go and log into the accommodation website, and then follow the links through to the various parts of the contract. Then click on the link that says Arrivals Destination and that should hopefully open up a PDF document, which tells you whether you've been allocated A-I or J-P. If you're too impatient to wait for the document to load up (like I was =P), then you can just look at the end of the address bar for the PDF document which should tell you (right at the end), whether it is an A-I.pdf doc or J-P.pdf doc.