I can see where a person can get confused with two sources for the same libre
kernel with the DNS one being on launchpad and yours being on your site and
hosted on fsfla. On top of that, DNS' repository acknowledges yours in his
notes and does seem like a duplication of effort.
Having a libre kernel that matches the Ubuntu one does give a piece of mind
knowing that the software in the repositories has been tested to work fine
with the kernel version. A modified libre kernel of the Ubuntu one may be
missing proprietary blobs and not be exactly the same, but at least the
versions would match and maintain stability on that version of Ubuntu.
Thanks for the clarification and reading my suggestion! :-)