K-Mart $10 off $20 purchase: Fraud?

Ok, so if you've been following any of the blogs I follow (Hip2Save, The Krazy Coupon Lady, Utah Deal Diva, Pinching Your Pennies), you'll see many scenarios and comments about a recently released coupon for $10 off $20 at K-Mart. I called to confirm the Logan K-Mart is accepting this coupon earlier, but much of what I'm reading now states that this is not a legitimate coupon. I'll call the Logan K-Mart again later and let you know if anything changes!