My cutouts keep exporting with a white background, even though there is not one in preview mode

Help! My cutouts keep exporting with a white background, even though there is not one in preview mode. When I preview the document or export it as a JPEG, everything looks completely fine. But, whenever I try to export or PDF the document, the cutouts develop white backgrounds that were not even initially present in the original picture. I've attached images of what it looks like. Any help is much appreciated! I did the cutouts on PhotoShop, and almost every other one is okay. I just really don't want to have to find and redo all the cutouts if I don't have to!