The one i took in my interview was brand new too, it's just that I really didn't notice those things he mentioned or maybe I thought they were not something that would cause concern. Another tip is to bring everything that she thinks will be asked, even the NVC Letter and the letter from the US Embassy from Manila stating that they have received the petition from NVC.
During the pre-screening, they almost refused to assist me, the lady said my file is not in their system, they told me it's still in transit or still with NVC. I refused to leave because i know I received the US embassy letter, the physical one and the email. Good thing i have the letter with me, the lady didn't have a choice but look it up again, turns out they put me in the system with my middle name listed as my last name.
Another tip is to always be honest in answering. They normally ask 1. When did you meet, 2. Where did you meet. 3. How many times have you seen each other, 5. When did you last see each other., those are questions that were always asked, i had to wait for a long time for my turn so i heard pretty much almost all the applicants while getting interviewed. I was also asked What's your wedding plan. Always keep the answers short and look the consul straight in the eyes while answering. All in all the interview was just brief, as long as they don't find anything that would cause doubt, she'll be good. Good luck to you both!