I just had to share this strange coincidence with Rootschatters.
I have been passing on all the info about our joint family to my cousin, who of course has become hooked as well, and has asked me to research her family on her mother's side (we are related through our fathers, so her mother's family has no connection at all with mine).
Yesterday I was checking out the marriage of her maternal great, great, great aunt in 1848 on Free BMD. I clicked on the page button to check potential husbands, and thought my computer had gone mad – it brought up the page I had been looking at last week, when checking the marriage of my (and my cousins's) g. g. g. uncle on my
father's side. When I looked more closely I found to my astonishment that my cousin's g. g. g. aunt was ON THE SAME PAGE! (They were marrying different people, I hasten to add.)
So among the eight names on the same page of the register were the marriages of two of my cousin's ancestors from
totally separate sides of her family, who were not to be linked until 84 years later, when her father married her mother.
I thought that was pretty weird!

Jane