Hello, don't panic :)
This is a generic e-mail. They mean to say that if you are going to bring anything to the interview, one copy has to be uploaded to CEAC and you also have to bring the original to the interview. You must have already uploaded some of it, but for instance, if you got a more recent police certificate, go ahead and upload that to the CEAC system as well. They just won't upload anything to the system on your behalf.
I can't say anything for sure about the Nufus Kayit Ornegi, however, my instinct says that they may let it go, since you are legally married in the US, and they are providing a visa for the US. I would guess his marital status in Turkey should not be of concern to the consular office (for instance, I am thinking that if a gay couple got married in the US, the consular officer would not deny the visa only based on the grounds that the Turkish government does not recognize that marriage). This is only a guess of course, but even if it is a problem, they will most probably let you know and give you the opportunity to correct it. The Ankara consulate does not try and make the process particularly difficult for the applicants, so you can rest assured.