Not sure what you mean, but I'll give it a shot.That's generally just a warning and can be ignored. We do provide 2 URLs though. The latter is http://syracusefan.com/styles/default/xenforo/logo.og.png which is still the default XF image and what really needs to be changed.
(BTW, please update your license URLs in your customer area so we have the proper records in place.)
<meta property="og:image" content="http://syracusefan.com/styles/default/xenforo/logo.og.png" />
The FAQ link provide by Brogan mentions it may take weeks due to Facebook caching. That's got to be it.The path isn't normally in the templates -- it comes from that style property. But if you have multiple styles (which you do), you may need to update the value in each of them.
<meta property="og:image" content="http://syracusefan.com/" />