Multiple duplis one each face

If I parent an object to a UV sphere, I am getting 3 children duplis per face. I only want one dupli per face. Is there a setting to control this?

Screenshots and .blend file so we can see what you are talking about

It seems the subsurf modifier was causing the problem. Even though the multiple faces weren’t real, each one still produced a child. Anyway, it’s all good now. Thanks.