Hi Dave
Sorry for the delay in answering the last post.
I have a George Millership son of Job and Elizabeth baptised on 18 July 1803 which fills in a bit of the gap in the births. Knowing the Millerships, they probably had a spell away from Oldbury, where there were some new coal mines being opened. There are a couple in Bedworth that had children in Bedworth and then the next 2 in Co.Durham and the next ones back in Bedworth.
My thoughts about the church minister or parish clerk getting the Millership/Millwardship names mixed up are supported by another couple's children. Thomas and Mary Millwardship had children baptised in Oldbury parish church, about the same time, but when 2 of them died and were buried in the nonconformist cemetery, they are recorded as Millership.
Why was Job said to be of the Parish of Warwick St Mary when he married Elizabeth Lee?

?
The only occasion in my Warwickshire research when someone unexpectedly turned up as being "of Warwick" was because he was in prison there, having been arrested for ill treating his wife!!!!
Will keep in touch if I turn up anything else!!!!!
Eric