SALLY JANE BOUND - 1828-1830

Tidbits I have picked up along the way about Catherine E. "Kate" Bound:

Sally Jane Bound was born in approximately 1828 and died on 14 February 1830 at the age of 2y8m.

Something is incorrect here as this would make her date of birth 14 June 1827 and that couldn't be possible if her sister Catherine "Kate" Bound was born on 2 Sep 1827. This is something that needs to be clarified on both of these.