But in this case the author has taken 2 of my addons, merged them and has admitted to this. It's no different than me taking loot drop or FTC and making minor changes and uploading it as my own.
It's gotten to the point where I have left a comment on his addon requesting removal of it. I have yet to hear from admins about this issue.
His addon
http://www.esoui.com/downloads/fileinfo.php?id=170#info
My own addons
http://www.esoui.com/portal.php?id=21&a=list