Blog posts appearing under newly created Custom Post Type

(*This issue is only occurring in the wp-admin)

After creating a new custom post type, the blog posts (approx 220+) are all being displayed/listed in the admin under the new post type, along with my new post type.

mydomain/wp-admin/edit.php?post_type=mycoolposttype

The displayed count is correct, however.

All (1) | Published (1)

When viewing blog posts in the admin, however, the newly created custom post type is not displayed.

mydomain/wp-admin/edit.php

The counts are correct as well.

All (223) | Published (209) | Draft (13) | Pitch (1)

How do I prevent the standard, pre-existing blog posts from being incorrectly displayed? I’ve reviewed my settings and can’t seem to locate anything out of place, leading me to believe this is a bug.