I created a new profile for Emily (Sprinkle) Buckner, and then I discovered immediately afterward I'd made a mistake. She already had a profile. So I merged my newly created profile into the old one.
The merge was successful, and there's only one profile - Sprinkle-2028. But Emily shows up twice in the list of siblings. If you look at Emily's father, Edmund Sprinkle, you'll see two Emily Sprinkles in his list of children.
If you look at any of her siblings, you'll also see two Emilys, though one is listed as a half-sibling, with only the father in common.
Where did I go wrong with my merge, and how do I fix it?