gRegorYeah, it gets confused for things like microdata or schema.org sometimes, especially if they're less familiar with microformats. Probably a lot of copy/paste in theme files, too. Not much to be done other than reaching out to theme publishers.
gRegorWe can discuss more in #indieweb-dev, but https://indiewebify.me/ is a good starting point to add basic microformats! You can paste in your URL and it will show what's found and make some recommendations.