Canned soup doesn't have a 1 year shelf life? I just looked and a can of soup I have in the cupboard is dated to Aug 15, 2012. That is more than a year away.
This isn't food that will store for one year ... it's enough food to keep one person alive for one year that will store for many, many years. If you have a cool, dry place, 20-30 year shelf life isn't impossible.
Now, when we're talking about keeping the stuff on hand that I normally eat, 12 cans of soup will probably last me a year.