Who? I realize that you know these details and that they might be listed in this thread or in a different thread somewhere, but it is better to assume we need the information and repeat it.
I don't know her name. I don't know the specific source reference where it says she was born 23 June 1811.
Date errors are common. Priests had as much trouble reading their own writing or the writing of other priests as we do. I have several date errors in my family tree. By researching EVERY household examination record for an individual, I can tell you the exact place where the error happened.
The record which is most likely to be correct, since it happened closest to the event (but errors can happen there too), is the birth/baptism record.