Two "Featured stars" shown on custom post types

I got this to use for a custom post type to let the client star some posts that will show up in a custom widget on the front page.

It seemed like the plugin would work well enough, since this isn’t a difficult thing to implement. But I’m seeing two stars appear for my custom post type. Whether or not it works doesn’t matter, this is not acceptable and would be embarassing to show a client.

Here’s a screenshot: https://i.imgur.com/F8yoANS.jpg

I would make this a support request, but it seems this was reported two years ago and never had a response. I’m not even using Magic Fields, so this isn’t a plugin conflict.

This explicitly states “Custom Posts” in the title of the plugin, yet this bug hasn’t been fixed. Ok?