Any edits to a cloned article will persist through to all cloned locations. If you want a cloned article to be disconnected from all of its cloned versions, you should copy and paste the content into a new Article on your desired page and begin edits on the copied version.
Can I Make Updates to a Cloned Article and Only Have the Update Display in One Area?
Edits to a cloned article will update across every location where it appears. To make changes in just one place, copy the content into a new article on the desired page and edit that version instead.