canonurum,
basically, u take Biometrics and FP at the same time. For my case, after the interview my local office issued letter that i need to submit Biometrics (index finger, signature and photo) One day after the first notice i received another letter from Missouri. It's exactly the same, but i ignored the 2nd letter because my Biometrics was already done. I think, u can do the same, just go on 23rd. You can ignore the second notice. Local office and ASC (Application Support Center) has nothing to do with USCIS.