You can set the exact order of products you'd like to appear of the top of this campaign by Pinning individual items.
The simplest way to pin a product from anywhere on the grid to the top is to double-click on it.
You can also click and drag products around the grid to a desired position. If you drag a product to a spot that is after other un-pinned products, it will automatically pin all products in-between to achieve that desired position.
Products can also be pinned to the top using the Products toolbox.
Pinned products will be highlighted with an orange box. They can be un-pinned back to their original position by hovering over a product and clicking the "Unpin" button at the bottom left corner of the product.