copy text from one page to another site page

ok, i made a change in what I call my master site on a specific page

I followed the steps and instructions, so why did it duplicate the page? the old page didn't have any new changes, the new page was perfect except, since it a duplicate page with a different name it's being ignored.

Did I miss something in the instructions?

I see a number and a delete button show up BUT nothin I see tells me what the delete button does nor what is that number, so I dare not click.

support is on