Nopcommerce Checkout "streed address 2" field not showing at checkout

Fix NopCommerce Checkout page which is not showing selected fields from "Customer settings/ Address Form Fields". We made a custom plugin to have a "fast registration" in NopCommerce so that the visiting customers only need enter their Tax ID (Social Security number) and phone number and email to make registry faster. You can test it at [login to view URL] and you can generate a working tax number from [login to view URL] so that it will permite you to finish the registrations. For testing we have disabled the SMS verification so its not necessary to verify your mobile phone to finish registration. Our fast checkout is working great but for some reason if a client that did our "fast registration" tries to make a purchase after his fast registration, when he is directed to the checkout and has to fill in ALL his information (full address) then the checkout page is not showing fields from the "Customer settings / address form fields" As you can see on the picture attached, I have selected the field "Street address 2" and also made it "required" but when the client goes to the checkout page and is asked to fill in his streed address the field "street address 2" which is critical for us does not show up. We need this but to be corrected so that all selected address fields appear at the checkout page. thanks Marcio