It looks like the Instagram API does not support the new Instagram carousel feature. The images results only contain https://instagramstatic-a.akamaihd.net/null.jpg and not
As a workaround use the iframe embed code to show carousel image, thats what I did in picodash, you can click and slide all the images.
if(data[i].type == "video" && !data[i].videos){ html = ""; }
(I'm pretty sure instagram knows about the issue and a real fix will be out)