Hi Jaebaeli,
Yep there’s a conflict. I can see the output of my plugin starting at line 123 of your homepage source, and another set of open graph tags starting at line 17. They are both outputting the same tags except for the Facebook thumb image:
My plugin output…
<meta property="og:image" content="https://kellijaebaeli.com/Blog1.jpg" />
..and the other…
<meta property="og:image" content="https://kellijaebaeli.com/kjbWPnavimage2014d_1200.jpg" />
As you can see these are two different images, and this can easily cause problems with services like Facebook and other that use the open graph protocol.
If you run your website URL through the Facebook debugging tool it even reports a conflict. Go to this URL…
https://developers.facebook.com/tools/debug/og/object?q=http%3A%2F%2Fkellijaebaeli.com
..and hit the DEBUG button.
Anyhoo, to solve this problem your theme should only be outputting one set of open graph tags, so disable my plugin or the other one.
As a quick troubleshooting exercise try disabling all the plugins. If you then view the source code of your homepage and still see a set of open graph tags, then you’ll know they must be hard-coded into your theme (likely header.php).
Also bear in mind it takes 24 hrs for Facebook to re-index your thumbnail. But if you run your page through the debugger as mentioned above it will change immediately.
Good luck.