Shadows you made?
Are the images for the frames stacked the same as the images for the shadows, horiz. or vert but matching?
Even if your margins are correct, the image has to be. I do not imply anything other than hoping it helps, but, maybe recheck the images , it is easy to miss something with transparent images.
Just suggestions, disregard anything you like or dislike since you may have done these things and I sound like I am insulting you.Not so. DT1