Hello I just saw your post. My mother’s interview is also scheduled for September. I was confused about the same thing. But if everything is already uploaded on ceac you don’t need to upload it again. I have filed for green card for my mom. Do we have to register in the www.ustraveldocs.np? Also if we have to what address do we have to write on the address for the passport to be sent. Doesn’t the address is given by the embassy? Please let me know if you have any idea because I am so confused. Thank you.