I have noticed that a very long excerpt in the ‘facebook status in facebook timeline’ sometimes fixes the issue. The meta description and og description are both identical and come from excerpt. But if that is not long enough to fill the entire box, the second line is picked up from content itself.
I guess that is what the problem is. If i have provided a hand crafted summary, no matter how short, the plugin should not be picking additional info from content itself.
https://www.facebook.com/funinfinite