When the sku is sent by a seller and approved on the Received Skus module, the images on the new sku on the marketplace's catalog are out of the order sent by the seller.

This behavior doesn't always happens though.

1. Seller sent a sku to the marketplace;
2. Sku is approved on the Received Skus;
3. Sku is created on the catalog with the images out of order.

No workaround.