Don't send teaser emails with wrong, "non-preferred parents" in lineage.
I repeatedly get emails with a new discovery or document about a name I don't recognize and when I go in to look, it's always about the wrong parent for my grandfather.
When I click on the link from the email, my grandfather's step-parent shows up, with a whole lineage that has nothing to do with me.
When I pull up the tree outside of the email link, my grandfather's correct parent shows up, with correct lineage.
My grandfather's correct parent appears as "preferred" in the list of parents, and the relationship to the other parent is "step."
I don't want to get any more teaser emails with incorrect information. They waste my time.
You can unsubscribe from those "teaser" emails. On a main FS page, click your name at the top right, choose Settings, go to Notifications, and turn off the slider for "Discoveries about My Ancestors".
The algorithm that generates those emails is very, um, simplistic. It completely ignores details like relationship types or user preferences.2