The default UberCart workflow for non shippable products, such as downloadable or non physical products (e.g. role or group access) is to mark the order "completed" only if it only contains these type of products. In most cases this is fine but a problem occurs when a customer purchases mixed physical and non shippable products. In this case access to non shippable products is not immediate. This workflow deviates from the common presumption that non physical transaction should occur instantly and be processed independantly from physical goods.