Hi,
Check the permalinks for the posts that don’t show up. I’m having a similar problem, and I’ve found that, if there is a space in the post title, it’s replaced by a dash in the permalink. But somewhere in the CPT UI plug-in, that URL is converted to use underscores instead of dashes for spaces.
A work-around is to edit the permalink for your post and replace the dashes with underscores. There’s got to be a better solution, though. There must be some way to tell WordPress to use underscores instead of dashes, or to tell CPT UI to use dashes in the permalink URLs.
I found the following help topic: https://docs.pluginize.com/article/135-dashes-in-post-type-taxonomy-slugs-for-url-seo. This says something about changing the Custom Rewrite Slug to tell CPT UI to use dashes in URLs. But it isn’t enough information for a newbie like me. It just says to fill in the field. It doesn’t give a clue about what to actually put in the field.
Any advice would be appreciated!
