Blank area where background image should be + image size inconsistency

http://www.kingstonebible.com - the top graphic should have a full width image across the top. My client can't see it, but I can. We've both checked in multiple browsers, purged caches and cleared files and no change for either. I can always see it, and they never can.

I also checked on a tablet, phone, etc. Not certain who is having the issue or how to resolve. I created the image to fit each size and is set to full width in upfront. So ya, help!

Also, on phone, the social media icons look bad, but in upfront they look just fine before I publish it.