Could it have to do with the fact that I'm currently living abroad? What should I consider in this case?
We recommend that you send us a pre-addressed priority mail return envelope with your application. This will help ensure that we send your new ID to the correct address.
Well, I got my non-driver ID in August, 2017 and I'm not sure what kind of document it is.
You have a Standard document. Newly issued Standard documents show: 'NOT FOR FEDERAL PURPOSES'.