In the past all the double packs were sent "as they are" to the retail shop which was showcasing the product as "integer" and only the buyer would take care for splitting them and get what needed.
Furthery, because of the high percentage of damaged boxes on the shelves, the supermarket decided to ask its personel to split them before putting on the shelves. Of course this is using much more time and so it is a higher cost for the supermarket. In the last years, most of the packing stations used to split the packs before filling the case, in a way to offer more added value to the product and let the supermarket save some costs. Today, for the first time this job can be completed in an automatic way which will fasten a lot the work of the people in the packing station.