It sounds like you need to disable WYSIWYG from the start? Using it to edit codes is known to break them.
I've been trying to make some edits to some user profile codes and I've found that whenever I tried to change an icon, it simply wouldn't show up. It only happened when I tried to change the icon or when I tried to add another. To make sure it wasn't the code, I even tried putting in the font awesome icons on a blank page, but when I disabled WYSIWYG, the icon wasn't there. Checking the code showed that the coding for that icon had been deleted. I was wondering if anyone else has experienced issues with font awesome icons?
Do you have this issue with ALL font awesome icons? I believe Toyhouse isn't using the latest font awesome icons version, so some newer icons may not work.