If you have not received a confirmation email after finishing your submission, you may not have finished the submission process. There is a simple way to check.
Go to afwerxchallenge.com and click on the "Tasks" icon at the top of the screen. Scroll to the bottom of the popup screen, then find this section:
Click "Submit Suggestion" and you'll have the ability to submit your draft. Once that's done, it should be submitted successfully.