@chemsem that is all right. There was a Submit button, but unfortunately there was a bug we noticed too late, so now it is not working :(. Sorry for the inconvenience.
You did everything correctly, now the only thing remaining is to edit the first post using this button
and add the Final picture, Concept sheet and your information into the first post.
Also, I noticed your final image got resized, probably because you uploaded a picture with bigger fie size than 3MB. If you make the file size smaller and reupload, it will have the correct resolution :).