Everyone at the office was confused with the split scheduling of I-751 and N-400. I showed up at 7am when the I-751 interview was scheduled as per the notice (but the notice did not have my A-Number or my case number), and everyone was super kind in trying to accommodate me. In the end the officer hurriedly prep’d for a combo interview at 7:30. He waived my I-751 (his words were “I see your kid is napping on you, don’t need more proof, just get their birth certificate with you”). By 9:15 we were out of the building with my certificate of naturalization.