When you publish files it doesn't generate the *.mini.jpg, but when you edit the file and update the images again it does generate the *.mimi.jpg files.
Other issue is the images uploaded for published files gets stretched to fill and match the thumbnail.
Example of what happens to the image.
original
after upload
Other issue is the images uploaded for published files gets stretched to fill and match the thumbnail.
Example of what happens to the image.
original
after upload