But, if we wish we can reposition them without changing the position of original photo updated on the original page.
Follow this simple procedure :
Click to the post on the photo which you wish to reposition
Click on Edit post
Drop down menu will appear in which click Reposition the photo
Click the Photo and move the cursor while clicking as per your wish.
Once you set the position, just click on Save and the saved position will appear on your page, while the original position of the photo on the original page will remain the same.