To edit your organization's positions or locations go to the Settings and click on the positions or locations link. You will see a popup like the one below:
Select how you want to to order by clicking the Order link at the bottom of the page.
If you choose Custom order, you can drag and drop your positions or locations in order. To do this, click and hold down your mouse or trackpad on the bars icon and drag and drop the item in the order you would like.