Ater a portfolio project page is created and filled with blocks of specimens,.you cant edit a element. You can't change the image anymore. See screenshot: https://app.box.com/s/f8erqweuunru6r0j6xrkrnw1bw663gbp
You have to delete the entire block and add a new one.
Is this a bug or the intended way, becouse sometimes is not really user friendly.