The recommendations shown in the Box Designer/Live Preview are randomly selected (alphabetical order) from your store's products. Half of them are also discounted so you can see what a sale product will look like in the recommendation boxes. These are just a preview of your products in the recommendation boxes and not the real recommendations.
The recommendations inside the Box Designer are just a preview of the look and feel of the recommendation boxes and not the recommendations you will have in your live store.
Our algorithms will start calculating the real recommendations when you 'Publish' LimeSpot to your live store.