i guess the reason is that you are importing the rigs and not the presets
Not sure what is what... The update has a section called 5.1 delays or something and everything says cut and paste them into the shared folder , usb them into the system through import. The I also downloaded them direct from this site and they import as rigs. I have not seen any other ones which claim to be "presets". I there some secret folder with "preset" and not "rigs" that I have to unlock or something?
I will try lightbox's method tomorrow when my head is a bit more clear and I am sure I have backups and what not.