There seems to have been some 'conflation' of two different men named John Baptist Lovelace (or Loveless). By making the assumption that the children are somewhat correct, and that the born-earlier could not have a wife born the same year as their son(!), I've separated them into these two branches:
John Baptiste Lovelace, son of William 'John' Lovelace & Mary Jane Lovelace, m. to Eleanor Robey, with 3-5 children
vs.
John Baptiste Lovelace, son of William 'John' Lovelace, with child William Loveless, I
All of this was rather UNsupported by any reliable documentation, simply doing some "structural" rationalization.
Hopefully this will be a start for further research (and expansion and corrections).