A corporate email supposedly went out last Thursday saying that only one $/$$ coupon can be used per transaction and I guess they began enforcing it at my closest store on Friday. I only did one transaction tonight, but others at the store were breaking theirs up into $20 groups to use the $4/20. I did the $15/$75 and a CRT $10/50 (they said no limit on CRT coupons and asked if I had more! - didn't). I don't know if the email went to all stores or individual stores because people were still stacking and super-stacking at other stores today (per relatives and friends), so maybe some hadn't informed their employees or hadn't read the email.
I just ran into this yesterday. I had 1 each of $10/50, $4/20, $3/15 & $2/10. I was spending $76, so I was told I could only use coupons combined that reach my total, so I did the $10 & $4 ( I know - could have used the $3 & $2, but the kids were starting to act up & the line was getting really long & I couldn't think that fast right then, so I just let her do it!) The kid had to call the manager over & that's who said about it needing to be under my total. She said they changed the policy because people were printing multiple copies & taking advantage of it

Of course I had to come on here & see if it was true or if they just didn't want to do it! Guess something did happen - can't say I'm too surprised though!