The correct ownership set is chosen for you automatically in your contest sims. The ownership projections shown in the “My Own” column is purely visual and cosmetic, useful only for your research and comparing your exposure to the field with the leverage column.
When it comes to the way your lineups are ranked and scored with contest sims and Saber Score, SaberSim automatically picks the correct ownership bucket and field lineups to use in the contest sims based on your plan and the contests that are in your entries file.