Step 1:

Select Folders from the main menu and open any existing folder.

Step 2:

Select any existing Checklist by clicking the Editor link at the bottom.

Step 3:

Click the reorder icon button from the top right of the Checklist.

Step 4:

Drag any of your checklist's sections accordingly.

Note: The system will save your positions automatically, Just click the close button in the right button when you're done.!