I looked at the mod files and was able to fix it in my local copy. It looks like a copy & paste oversight. Simple enough to fix once I knew what needed to be changed and to what (it took me a bit to find what would get the recipe showing up in the foundry).
I also got into the Github repo and made a pull request to incorporate the changes I made into the main mod. If you're lucky, maybe an update will be pushed sooner rather than later.