Boots have been previously professionally recolored, and have a small hole on the left boot near the logo, see photos.

This particular model had a manufacturing issue, where the glue would melt and spread around the shoe. 

You can check any other listings of this model, and you'll see the stains all over both shoes. It's the same for every pair of these shoes that ever existed. That's why these ones have been professionally recolored to hide the stains and restored to its original state, like they appeared on runway.