Templated polygon turns into a wireframe
I'm following a tutorial at the moment that requires me to work on just one side of a model, and duplicate the other side as an instance. The tutorial then tells me to right click on the new, instanced side and select "Actions > Template". Supposedly, this shouldn't change how the polygon is viewed, but no matter what I've tried I can't get it to appear smooth shaded like everything else.
I'd appreciate it if someone could tell me where I've gone wrong.