More vague answers. Maybe it's my explanation. Based on what I've found prior and these replies, I can only assume that what I want is not possible. The folder structure is based off the {authors} field. I want the {authors} field to remain FN LN, while at the same time using {author_sort} for the author folder since it sorts properly in the file system. The problem is that it seems the import is fixed at using the {authors} field. I know I can copy {author_sort} into {authors} but that's not what I want. I'm syncing bazaar now so I can dig through the source and hopefully change it.
@BradWaite, I noticed where was an option to replace space with underscore, but I don't recall one to replace comma with underscore. I've not gotten there yet so maybe that just what it does. And if indeed that is the case, I'll be changing that as well