Amazon caches the ads on your site to make them display faster when someone loads a page. When you make changes to the page, you may not really see the changes correctly right away.
The changes are made. Anyone coming to the page will see the changes. But you are seeing some kinda confusing cached stuff.
If you want to see the page with the changes, use a different browser. That browser will cache the page, too. That’s why I have Google Chrome, Firefox and Microsoft Edge browsers. I load the edited page into a different browser to see the changes.
If you don’t know this you can spend hours trying to “fix” something that is only broken for you.