kindle previewer layout issue

Hi there. I have an issue with my text layout in kindle. see previewer page with text which appears forced left for some reason. can't figure out why. there are places in the text its fine and other places some paragraphs are forced left. see attached Kindle previewer page and then the code in sigil.

any help appreciated. once I can do one I'll do the others. there's about 20 in the book.

Regards,

David

Attached Thumbnails