Huh, you know, I think this is a flat-out bug. I tried using the template for a spherical parametric surface, and that didn't work. Then I tried the one for a cylindrical parametric surface, and it didn't work until I changed the phi to a theta. I think somebody's confused over whether the azimuthal angle should be called phi or theta, and it's futzing up all the 3D cylindrical and spherical coordinates.