Shopping Bag

I made this shopping bag last year from a Butterick pattern B5507.  The only problem was, the pattern DID NOT say anything about this being a bag that is folded up!  So, I kept wondering why was the pocket on the outside of this bag so weird?  Then, I FIGURED out, (the hard part), it was a bag that was folded into a pocket for shopping!  And, I thought, why couldn't they have told me that??  Sydneykatt