Hi Jeff,

Your designs are probably being recognized as poster designs. Designs that are suitable for poster printing are automatically recognized by our system as posters based on their file properties. The image format may be quite big. Unfortunately, since the template function cannot be applied to poster printing, you won’t be able to create a template based on poster designs. Of course, you can use your design on other products and apply it to templates that you already created. (https://help.spreadshirt.com/hc/en-us/articles/360008958033-Faster-Product-Creation-with-Templates and https://help.spreadshirt.com/hc/en-us/articles/360001698514-Optimize-Designs-for-Poster-Print)

Alternatively you can also let me know the design ID so I can check whether this is indeed the problem.

Best,
Lena