Need help regarding duplicating a running Ad on Facebook

How to duplicate the running ads the right way?(Prevent Overlapping)
-If I click the running ad, hit the duplicate option,and change the ages,and then run that ad,will it not overlap with the first ad that was running?
-The first Ad that was running, was targeting the ages 18-65+ the new ad will target the ages 18-28,

yes it will overlap because you have the same ages.
Change the first ad to 29+, and then you would be fine

I have just transformed my Facebook profile into an official page in order to better share content and manage the influx of new "likes". And I would like to keep the publications of my profile and transfer them on the page, how to do? Thank you.