Wanted to share with people who are submitting their applications, that if you see a list of missing items, after "Proceed to submission" button, don't freak.
I saw a list of missing items raging from study abroad and the highest degree obtained, items I knew that were in order.
The system will let you proceed to the payment without a further problem, even if you see a red list of (falsely) missing item(s). I am guessing that this is a bug in the system.
Good luck!