If you have manually inserted images into a WYSIWYG editor, it is your own responsibility to design the layout. This is why we require you to use post images.

However, having said that, there is another alternative which is to utilize css to fix this. To fix it, add the block of css codes into /templates/wanderers/css/custom.css

.eb-post-body.type-standard > img {

  display: block;

  width: 100%

}