Comment 1 for bug 1068353

This is more of an issue now that we provide both .img and .iso names as symlinks to one another; as seen at http://old-releases.ubuntu.com/releases/zesty/ this results in the same image being double-listed.

However, neither http://releases.ubuntu.com/16.04/ nor http://releases.ubuntu.com/17.10/ appears to be affected, so perhaps there is some logic present to consolidate these but this does not work for old-releases.