I'm finding the match's that Ancestry is doing very frustrating!
I'll explain and maybe someone can shed some light.
I have myself, my father and his half brother DNA tested.
My father's half brother (my uncle) share the same biological mother but not the father. He is linked to his father as adopted, NOT BIOLOGICAL in the attached tree.
AncestryDNA is giving me shaky leaf hints up through his step father, he's not the biological father.
Does AncestryDNA not pay attention to how he's related to his adopted father???
If not, they should!