It took a while but I think I have figured this out. I believe a correction was made to the copy of the birth record enclosed with the Allegati of her first marriage to Filippo Castronovo who died a year after marriage and done for her second marriage to Antonino Castronovo brother of Filippo.
This is the Allegati for her second marriage to Antonino Castronovo:
https://familysearch.org/pal:/MM9.3.1/T ... n189737781
This is the birth record that was enclosed with the Allegati of her first marriage to Filippo Castronovo.
http://i460.photobucket.com/albums/qq32 ... 4864f6.jpg
Note that the first name of Francesca was left off this copy.
Would someone like to confirm what my thinking is please.