What version of Breadcrumb NavXT are you using? If it’s an older version there may be a bug causing this that has been fixed in newer versions.
If the category was still displayed, after unchecking the “Show the hierarchy (specified below) leading to a post in the breadcrumb trail.” option and saving, then the most likely explanations are:
- Your post is of some other post type.
- You’re manually instantiating the
bcn_breadcrumb_trail
class and not loading the settings.
- Your page is being cached, and the cache isn’t updating after the settings were changed.
- The breadcrumb trail you’re talking about isn’t being generated by Breadcrumb NavXT.