So I did a debug test here:
And everything checks out. My og:description is what it should be.
However, when I submit to FB, it posts the notes I entered in the "Excerpt" field.
Looking at my html source, there is no way that FB can see that excerpt (it's not outputted).
1. Does JetPack->Publicize manually build/submit the og:descriptions to Facebook & G+?
2. If not, how did FB get a hold of this excerpt?