Problem with OG description tags

Hi,
I want an image and description tag on a specific parent page which has no content at all, it’s a parent menu page (e.g domain/nature-articles.html).
I type:
{SCOpenGraph image=http://mysite.com/images/ogimages/articles/nature.jpg}
{SCOpenGraph description=Articles about Nature!!! etc}
When I share that URL on Facebook it works fine and is what I want.

But when I share the child page URLs (which contain an image and meta description) facebook does show the correct og image but the wrong og description (the one from the parent page). I use Facebook debug tool for this many times.
Why is the parent description getting picked over the child description when i'm sharing a child URL? And why the same is not happening with images, they are picked fine.
Basically i share a child URL which shows the correct content image but with the parent description.

What am I doing wrong?

Thx

I tried what you said and couldn't find the source of problem

it's hard to explain the issue properly so i sent you a PM with an image with URLs, screenshots and text explaining it all.
Hope it helps

Thank you