When I use the template gallery, I load the photos to post correctly but I appear on the page twice. I can give some solution. Thank you. http://cortinassuperdecor.com/?page..._id=345&preview_nonce=2af6e357a6#!prettyPhoto
Go to your Dashboard > Pages > all pages and edit your gallery page, Then remove code from page editor. Make it blank. It will resolve your double image issue. Check image for reference.
