Hi. This thread is a bit old but hopefully you are still getting alerts when someone replies. I can clear up the mystery as to why Julia Augusta appears in two baptism registers. I am researching Rev. Dr. William Bengo Collyer (1782-1854) who carried out the baptism.
Dissenting ministers tended not to baptise their own children - a colleague would do it. So there are other examples of Dr. Collyer coming to a minister's chapel to baptise the minister's child. He tended to record the baptism in the local register and in his own register back at Hanover Chapel, Peckham. The entry in the Hanover Chapel register says explicitly that Julia Augusta was baptised at the Woolwich chapel.
This is the explanation in this case: one event, two records of it. However, it is not unknown for children to be baptised twice - sometimes in different religions. The register for Hanover Chapel (which Collyer called an 'English Presbyterian' chapel) includes individuals who were also baptised in the Church of England, and I have found one who was also baptised in a Baptist chapel. See my website
www.wbcollyer.org for info on Dr. Collyer (the site is a work in progress).
Also have a look at the Surman Index to dissenting ministers: find Thomas Sharp and look at the image of the index card - it contains more info about his career:
http://surman.english.qmul.ac.uk/