Empty Movie Clips and Duplicating Clips

I’ve been trying to reproduce an animation effect I’ve seen on the Armani website, but I’m stuck trying to duplicate an empty movie clip with image loaded into it. The duplicates exist and I can move them, but they are invisible. Since the duplicates reside on depths above the intitial clip I’m confused about why they are invisible. The duplicates are scripted to follow behind the initial clip - each offset by 30 pixels (though I don’t have that working perfectly).

I’m attaching a simplified version of my file to isolate just the duplication troubles. Thanks for the help!