During ordering in your shop, the basket stays active until an order is placed. This means that a customer can order pictures from multiple jobs or albums.
Once an order is completed the basket is emptied and it is no longer possible to change the content of the order.
Please note: Product packages can not be filled with pictures from multiple jobs. The same applies for albums within the same job, if the price profile for the album is deviating from the one in the job.