Hi Shirley
I have taken another look at 1841 Dunham but can't find any other Lightfoots. Sorry.
I have also looked on the IGI for all your Lightfoots and can't seem to find any of them. I thought Hume(Hulme) would be a good bet as it is an unusual name, but no, couldn't find him either. They are a mystery.

Where you have put James snr. born 'out of country' should read 'born out of
County which means he supposedly wasn't born in Cheshire. However, it could also mean that he wasn't born in Bowdon.
Are the William, Betty, Hume, and John your ancestors, or is that what you are trying to confirm?
I will PM Peterbennett and ask him what he thinks is your next best course of action, as I can't think what to do next.
It looks like there were two James Lightfoot's born around the same time, who married in the same year, one to Dorothy and the other to Ann. I think (I could be entirely wrong) that the one married to Ann at Bowdon, might be the James born in Dunham.
The one married to Dorothy could be the one born out of County.
I think you have a bit of a problem here.
I'm going away for a fortnight tomorrow, so I'll see if Peter can help you.
Kind regards
Su