Android view and I phone view are different. I phone homepage view not showing c

Hi,   A complex question:   Viewing the website coedffest.org from an I phone seems to upload funny on the home page, whereas Android seems to work fine. On I phone it is not displaying the main featured picture, which is a shame because first impressions are everything when dealing with websites.   Any suggestions if I can do anything about this?! It's really frustrating...   Thanks