The video below shows the process of How to update the order of Sidebars (click the button on the bottom right of the video to expand the view). You can also follow the screen shots and steps below this.
2) Click on the "Sidebars" button on the left hand side of the Toolkit.
3) A list of your sidebars are displayed here. Use the up and down arrows to change the position of your sidebars. The position numbers on the far left show which order your sidebars will be displayed in. If a sidebar is set to unpublished then its position is skipped.