Does being born with six fingers or toes, or double rows of teeth, occur among the contemporary Anunnaki bloodline (Nephilim)? How is that handled if it happens?

It does occur on occasion as a legacy of the ancestry. This is easily corrected surgically and is simply considered a cosmetic procedure and when done early in life, is scarcely noticed by the time these infants reach adulthood, so this is little noticed nor tracked in a systematic way. Because of the further interbreeding in various other cultural settings, this is not a reliable diagnostic indicator of a member of the cabal, as the individual might be an inadvertent product of a sexual encounter outside the normal constraints for relationships and, therefore, not truly one of the sanctioned, official bloodline members who have power and authority.