You all are incredible. Overnight all kinds of questions answered and brick walls disappeared!! Thank you!!
I think I figure out the 1850 census age issue for the Millers - looking at the original I think the 5's were wrongly transcribed as 3's - lopping twenty years off Stephen and Mary's ages!!
Everything else makes sense though!
If you ever here about a Finedon or Northamptonshire inhabitants being recruited for a new colony in Venezuela in the 1840s, let me know (glad they didn't make it there, or I wouldn't be here!).
Thank you sooooo much!!