1. In the Left hand Tree Click on the Page you wish to reorder the Products on
2. Now click on the List Tab at the bottom of the editor
3. Now with your mouse you can click on the Product Id and drag it to the location you want it to appear in.
So for example in the image above, If I want P62 - Product 57 to appear before P52 Chinese Tea Set, then I need to click on P62 and drag it above P52 with my mouse.
So I have the following result
