Normally when a merge should be done, there are some children linked to one parent but not the other. Frequently there are duplicated families so we have father, mother, parents for one or both and some of the children that are all duplicated. Usually these types of families get found because someone gets linked to a Find a Grave that naother profile has or one person gets linked to a family where it cause a marriage on same day error. When I find one person duplicated in a family, I look around at everyone else because you can find others usually. When most people add one person and parents, they don’t necessarily add all the siblings, just the one they are related to, at least initially, so that is why all children don’t get duplicated in both families, like the Evarts.