hi Brian,
I have my 2xGgrandmother buried in a family plot along with her daughter and son,
and my 2xGgrandfather,s second wife,
while he, him self in in a single grave,

I have no clue as to why, he was not buried with either first or second wife, other than
perhapes there was no room, or his wishes,
or even finances, but you do raise an interesting question.

regards yvonne.