Problems with pictures showing on the site

I just spent 2 hours with tech support with Bluehost to try and resolve an issue I’m having with my site, http://www.protectingcyberkids.com, but we weren’t able to fix it. At the end of October, I upgraded to the latest version of WordPress (3.7.1). I’m still in the process of working on my site and haven’t done any work on it for a while. So it wasn’t until a few days ago when I pulled up the site that I noticed the home page image was missing (although the text boxes show) and all of the images on my Education page. I had a programmer make custom changes to this theme (Ally) in the stylesheet and everything was working fine. I noticed tonight on the dashboard in the Themes Appearance section there is a message that says:

Broken Themes

The following themes are installed but incomplete. Themes must have a stylesheet and a template.

Name Description
__MACOSX Stylesheet is missing.

I am wondering if something happened to the theme and the stylesheet after I downloaded this last version of WordPress. When I look at the Ally theme on my site, I see the stylesheet and all of the custom changes in this file, so I don’t understand why I’m getting this error message.

I am at a lost of what to do and would appreciate any advice you have to resolve this issue. I was hoping to launch this site next week but can’t do this unless I rectify this problem.

Thanks so much for your help.

Ellen