Why does an element show up on all of my CMS pages?
If you’re seeing same content in your CMS page, here is how to fix it.
Your CMS pages act as templates for all content linked to the CMS. If you add a video, image, or text to the CMS page without linking it to a CMS field, that same media will appear on all pages.
Here's a helpful video demonstrating how to set up a CMS page:
For a comprehensive understanding of CMS, check out this complete course.
If you're still having problems, feel free to create a support ticket here.