Okay this was posted in the break room at the Kmart where I work.
One day double coupon even happening Sunday Oct 31
you must have and use your Shop Your Way Rewards card
doubling coupons valued up to $2.
maximum 5 coupons per person per day
hand written across the bottom was this note "minumum purchase of $25 required for the customer to get double coupons" (this part ruined it for me).
I don't know if the minimum purchase requirement is at all stores or if our manager tacked that on for just our store.....