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What is happening with that facebook added dialog is that its being added, but it overflows the row box, so scroll bars are coming in.
If you click LIKE then scroll down over that section you will see the whole thing comes into view.
The problem is since its at the very bottom of that top row, (looks like a 12 col) the new stuff is hidden when it comes in.
If you were to put something underneath that section to give the facebook added section some space, it would show. Or if you added it above the images, it would show.
Are either of those options?