To follow-up, I *did* just obtain some additional information from the FindMyPast site, recommended by "gnu." it was very helpful, so thank you! I have now John JONES of Chirk m. Elizabeth CASH of Chirk, 16 Aug 1824. Job JONES, their son, born May 3, 1829.
John JONES who m. Elizabeth CASH was likely born 8 September 1804, and baptized 10 February 1805. However, there is also another John JONES of Chirk, also son of John and Elizabeth, born February 17, 1802. Perhaps this first John died and the couple had another child with that name.
There is, adding to confusion, another Job JONES, born in Chirk in 1830. He is one year older than "my" Job JONES in other Census records. He is the son of John and Ann, and also moves to Staffordshire, but several years after the other Job JONES. Any relation? It seems Job is not a terribly common name for Chirk.