You are looking at the wrong directory. /media/media_info, usually, is not changed from what it was when originally created. To see the current hdlists you need to drill down into the repo, for example to /media/core/updates/media_info:
ftp://distrib-coffee.ipsl.jussieu.fr/pu ... edia_info/This has been updated and it is this that is used for locating packages to update.
(The files in /media/media_info are actually symlinks to the files in the respective repo's.)
Jim