Thank you for coming to the Community about the post you created through Social Share. I apologize for any confusion this Newsletter image may be causing. Was this not the image you originally selected to post on your page?
This Newsletter image you described is a stock image we provide all of our customers in their accounts. If you do not want to use this stock image, you can always select an image from your Library instead. Images of your own can be selected or uploaded into your Library by clicking the picture icon in the top left hand corner of the image shown.