If we are talking about Faceshop as available at DAZ3D, it is not as reliable as the author intends it to be, unlike there have been drastic changes to improve the product.  I have always found it to distort the mesh at one point or another, making it totally unusable for injecting morphs.  The workflow to using it, export as a head obj of your model from Poser and import it into Faceshop for initial setup.  Never use the built in models offered, they are not mesh accurate.  Proceed with the wizard until you get a reasonable morph, then export that as your new head obj with a recognizable name.  Use that as your target inj morph.