Photonic Popup overlay renders beneath menu and is not truly modal.

I’m using the Google album to create justified thumbnails. I’m using the overlay popup to show thumbnails. However the popup renders from the very top of the screen and I’m using a theme that has a sticky header and the popup is rendering beneath the header and I cannot get to the “X” to ever dismiss the popup. The popup is not behaving as a modal popup. To see this behavior goto link provided click on “View..” then click on a thumbnail.

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