Whenever I make a copy of a WordPress PAGE the original page redirects to the new one. I give the new page a different Permalink but it still redirects.
I pinpointed the issue to your plugin (I deactivated all my plugins and then checked each one to see when the issue cropped up).
Second, may I ask you how you make a copy of a WordPress page? I've looked around a bit, and it seems you'd need a plugin for that. Is that correct?
Maybe that plugin and mine conflict in some way. I don't know. If you let me know the plugin you're using maybe I can find out. My plugin doesn't do any redirecting, it only adds the code you want to add raw to the page.