Coupon Zone coupon wrang up wrong....

I hope I put this in the right place...
I know most of us couponers are dilligent in making sure our items wring up at the right price but I had a new experience with the cz coupons this week. I was using the save $1 on any iogo cz coupon which are scanned in not manually entered. I have used these before and never had an issue. This time around when she scanned the coupon it came up only $0.03 off. I noticed it when my total seemed a little high. The cashier had to manually enter the adjustment and could not figure out why they were coming up wrong. Just thought I would put this out there so other people know to watch when the coupons are scanned....

I have had this happen before with the Resolve $2 coupon.