So I tried those methods... Perhaps I didnt do a good job of it, but I couldn't figure out a way to make it work :\
The metadata is definitely in the .opf. I wasn't sure how the Metadata Edit works? I tried a few templates, tried using Polish "update metadata," in both orders, and couldn't make any metadata appear. I may have done this wrong...
Unfortunately integrating the editor with calibre to update metadata didn't do the trick either