Why WP Super Cache Preload Create post auto

That’s expected, as the front page is usually a very busy page on a website, so it’s presumed that it is cached already. At the end of the preload, any old cached pages are deleted, so the front page will be refreshed when someone visits it.

No, there’s not really any performance problem. The first visitor to go to the homepage will cache it, and then everyone else will see the cached page afterwards. Your site will be faster too because all the other pages on the site are cached, so uncached pages will be delivered more quickly.

It does exist in your database. It might have been created by a plugin or theme you’re using?

The plugin reads from the posts table to get a list of pages to fetch.

Take a look in your posts table in your WordPress database. You’ll be able to find those URLs in there. You’ll need to delete those records, but before you do, make sure they’re not needed by another plugin.

Unfortunately, there’s no way to stop the plugin fetching those URLs because it thinks they are legitimate posts on your website.