Hi,
It looks like "Son" Joseph aged 1 on the 1871 census was actually Josefina Rosina

Baptism on the new family search:
Josefina Rosina Stephens baptised 19th June, 1870 at Whitegate, Cheshire - Parents Joseph Stephens and Anne Pimlet.
Baptism of Clara Adelina Stephens at Christ Church, Bradford, Lancashire on 14th February 1875 - Parents Joseph and Annie Stephens
Regards.
Mo