You can't submit anything until 9/15. I double checked. There is an area where you can click that shows the programs you "can apply to" at the moment, and if you look, all of your selected residencies will be greyed out.
You can enter your "Application" portion for certification. The actual application to programs is different, and that opens on 9/15. Once you certify the "Application" with pubs, ECs, etc, you can still work on the personal statement and other tabs (Documents, Programs).
On 9/15, you'll be able to actually apply to the programs. This is where you pay for the programs apps and the transcript fee.
It isn't confusing at all! 🙄 Heh.