I actually read the Smashwords style guide to the end and discovered you can de-activate any dud e-book versions you don’t want your book downloaded in at Smashwords. So I’ve disabled everything except EPUB, MOBI and PDF at the baobab girl Smashwords page. MOBI still needs a small format fix, but I think I now understand why the first-line indent happened.
All this makes me a very happy poetry publisher!!