How come red is over blue in the right part of the picture?

The parents for Adriaan Mutsaers G4PS-Z4C are in a reversed order. This happens rarely, but it can occur.

To fix it, go to Adriaan's profile page, and in the Family Members section, locate him in the Parents and Siblings column. Click the pencil icon to the right of Adriaan, and you'll see this popup:

Click the Switch Parent Positions button (circled in Red) and confirm. That will fix the appearance of the Tree view.