It took me a while to figure out, but that method of loading the character in Poser, adding the morphs I want, and saving (making sure 'use limits') is checked and then importing into Carrara has solved all my morph problems.  I don't know why certain morphs don't work in Carrara any other way, but for me the important thing is that the workaround works, and I can get all morphs working in Carrara.  At some point though it would be nice if Daz fixed this little issue so I could load all morphs in Carrara and they would all work.