I can't be certain, but I strongly suspect that the first (#968), filed just a few days after the birth, had several errors that were corrected on the second. As far as the number of children is concerned, note that the first section is the number of previous births, which would not include the current one, so 8 previous births and 9 now living indicates that all of the previous children are still living. It's too bad that the stamp in the upper left corner is illegible on the second certificate. Knowing what date it was filed might help clear up the mysteries.
Deborah Blankenberg (JewishGen ID #613395)
Researching BLOCH/BLOCK (Germany to New York, Colombia and Missouri), BLINDER (Kishinev to New York via Poland? and Paris), KUSHER/KUSZER (Lodz vicinity to New York via Paris), GOLDSCHMIDT (Germany)