From what it sounds like, the deal is still "on" per CAG: locater918 who at 11:11 AM CST, stated he picked up a $4.97'er earlier today and got the coupon. For those who haven't had luck today, it could just be your store?
That said, I have never known Kmart to go to 'any lengths necessary' (even if there is a glitch that is probably going to cost them tens of thousands of dollars (just speculating with the dollar amount}); point is, they (Kmart/Sears) have historically been lazy and this isn't the first time that they've f'd up like this (to the benefit of a CAG). Keep trying, they'll keep printing.
BUT, I will say (from experience), I think around this time last year (when you actually had to spend the $45.00 to receive a $15.00 No-Strings-Attached coupon) I spend the $45.00 in 5 separate transactions and received 5 separate coupons, after transaction #6 and like someone earlier in the thread said (his 'freeze' came after 4 transactions/coupons), my SYWR Account was put on hold/'freeze' (no coupon after transaction #6) and I had to phone into a CSR and explain why I had so many separate transactions in such a short period......Anyway..best of luck out there.