Wrong label on CD images?

[ianb@nulogy.com]

I was downloading the netinst amd64 CD image provided on the AMD64 port
web page, and I noticed that all of the linked images seem to have the
wrong revision number.

The netinstall image points to:
http://cdimage.debian.org/cdimage/unofficial/sarge-amd64/iso-cd/debian-31r0a-amd64-netinst.iso

but on the web page it is noted that this should be 3.1r1:
http://www.debian.org/ports/amd64/

Is this a problem with the webpage, or the images? Or is there something
subtle I'm missing here?

~Ian