I hadn’t thought to check for a duplicate initially because it wasn’t showing as a Probable Duplicate Submission. It wasn’t until the designer uploaded another design that I knew right away was a duplicate that I decided to check the first design they uploaded. And sure enough, it was a duplicate as well.
This user has three identical designs online.
Multiples of the same design: https://addons.mozilla.org/en-US/firefox/user/nanasoshi-1364604510.21/
Three of the same design: https://addons.mozilla.org/en-US/firefox/user/msk1974918/
https://addons.mozilla.org/en-US/firefox/addon/faely-sleeping/ - 1 users
https://addons.mozilla.org/en-US/firefox/addon/faely-sleeping-99327/ - 1 users
Three of the same design: https://addons.mozilla.org/en-US/firefox/user/jacksson-1364599952.3/
One designer, 4 of the same designs: https://addons.mozilla.org/en-US/firefox/user/syjusz/
One designer, 3 of the same designs: https://addons.mozilla.org/en-US/firefox/user/DJMadza/
I didn’t realize this person created a second account (or so it seems) and uploaded the design to both accounts. I had checked the deleted tab and saw that it had been deleted once already, so thinking that it was the first one I approved that had been deleted, I approved the second one. Sorry!
this author has made 3 themes, all exactly identical