Hi, @PD_ 
Thanks for reaching out. To help with clarity, are the properties you are trying to include also calculation properties? Or are they other number-type properties?
Also, can you include a screenshot of the working version you created in-app? Or what you are referencing here, “I even tried to create a calculated property that was identical to an existing calculated property but just with a different name. I got the same error”?
Best,
Jaycee