Did you sign up for mPerks the other day when I posted about their new electronic coupon savings program? Be sure to re-log into your account and add a new coupon that's available $2 off any purchase of $5 or more! Coupon is good through 9/18.
I used mPerks for the first time last week and it was VERY easy to use and the discount came off with no issues. Just hit the mPerks button at the bottom of the self checkout screen and enter your cell number and the discount automatically come off!!