Your suggested solution to add a featured image and add
does not work.
(CAPS to emphasise not shouting!!)
I have a test page. with this code
<img src="http://loveitphotography.uk/wp-content/uploads/Camden-April-2016-0978-200x300.jpg" alt="Camden April 2016-0978" width="200" height="300" class="alignleft size-medium wp-image-1649" />
I have a featured image.
The featured image does NOT show on the home page or the main page.
If I put <!–more–> in the post the featured image DOES NOT show up in the home page but the image in the post DOES.
I have had to revert to the current system.
Any ideas why <!–more–> has an influence on what is shown on the home page?
The current process is good – just need it to work without <!–more–> in the post.