From your link:

"Part-year resident

If you lived inside or outside of California during the tax year, you may be a part-year resident.

As a part-year resident, you pay tax on:

• All worldwide income received while a California resident
• Income from California sources while you were a nonresident"

The only income earned while in California is the California portion of the W2. The additional income was earned while she lived in the Netherlands.