[whpalmer4]

The purple styling indicates (by default) that that action is a Next Action. If there are multiple candidates to be the Next Action, the one listed first is chosen. If you dragged the xxxx (Germany) action group to the top, the first available action there (Get Moving Calculation) would be colored purple. Note that you've set due dates, not start dates, and due dates have no influence whatsoever on what is considered a Next Action. Start dates, on the other hand, are very important, as an action or project or action group with a start date in the future will not be considered to be a Next Action until that start date is reached.