No need to create a new thread. Just edit the first post.
Anyway, for the issue itself, I believe it has something to do with Texture Maps. I’m not really sure but I’ve never really needed the feature as most of the art I get are already in PNG format with a transparent background. Also, the Pro version of Texture Packer allows you to enable Heuristic Mask which automatically removes the image’s backgrounds. That might help you.