CPT duplicating as a regular post

Hello:

I’ve looked for an answer to this, but only found something similar from last year https://wpgeodirectory.com/support/topic/duplicate-post-drafts-6063-for-same-place-cpt/

In my case the CPTs are working just great, but every time I publish or update a CPT (I’ve made a couple), a new regular old post is created – not as a draft, but as a published post. It has no category assigned, of course.

I’ve updated all of the plugins – core and ones that I have installed – to no avail.

Is there something in the CPT setup I’ve overlooked – like a a toggle that lets me turn this off? I can delete these, obviously, but I’m hoping to head it off at the pass…

Thanks for your help.

Lisa