Include the full payment or the Chicago Lockbox will reject your package as incomplete. The NBC, handles the bio part of the process. They will make the determination after receiving your forms from the Chicago Lockbox whether or not you need to go in for another bio appointment.
One more question regarding the AOS package... The doc list indicates I-797 form and I have two of them - one original I-797B as my current H1B approval notice from 2017 and another I-797 as approval of my recent I-140 petition. Which one(s) should I include in our AOS package? I believe with EB3-based I-485 pending my status is still H1B so only the first I-797B should be included but wanted to confirm.