We have confusion between the birth place and army record in England also. I have 3 Flemme brothers born in 'Drypool' in late 1800's but their army record states 'Hull' another official record states they are from "Sculcoates". All three place names are the same area but are known by different names for the church parish, the civic parish and the larger historical place name.
Illigitimacy of August Hattorff could be the answer - I have baptisms of 2 illigitimate children but they can be seen on the Salzgitter census in their maternal grandparents home using their father's surname even though the father was not yet married to the mother.
<< The Ortsfamilienbuch Uslar was recently published. There is no Johann
August Hattorf mentioned but there are some von Hattorfs listed.>>
The only reason the von Hattorf(f)s are in the Uslar book is because they married in the church (which was probably the parish of the bride) or died in that parish. If August Hattorf did not marry in Uslar he would not be in the Uslar church book. I think Uslar must be the large dioces? and he was baptised in a smaller parish church near the birth such as Osterode. I have noticed in my German, English and Scottish research many first births (and some difficult births) were in the homes of maternal grandparents - maybe the birth of August Hattorf was such a one.
1804 : This is the time of the rule of Frenchman Jerome Napoleon who re-organised everything. Who is to say if some church and civic records were destroyed in the war.
Rena