I’m puzzled that your criteria fail to exclude those with the Seal to spouse. Another approach that shoul work is to Mark those with Seal to parents and then Unmark those for lacking the Seal to spouse.
I now know why my prior group selection “seemed to not work”. In another post, apparently, intentionally the People List does NOT automatically update when a group change is made. You have to load a different group and then go back to the group you had updated to see the changes. Someone has put in a request to add an “Update” button for that People List.