The Problem

If you have the Gigawatt slider enabled in Theme Options, you may see your images duplicated in the slider on posts where only one image should be. This is a problem with the WooCommerce product gallery including the image you set as featured.

The Solution

Edit the product post and check the Product Gallery meta box on the lower-right and remove the image by hovering over and clicking the X. The image should remain in the featured image panel. Click Update.