I added some spacing 'for readability' into the profiles of Andrew Smith-146122 and Olive 'Pitt', who is mother of his son, Thomas. From a somewhat quick review, based on the biographies in Andrew and Olive's profiles, they do look like a duplicated family since all of the children that are linked in Smith-2689 are mentioned in the other profiles.
I have proposed a merge for son and his mother to the related people in Smith-2689 family.