Limit 1 Coupon Per Transaction: This means limit 1 like coupon per transaction (or per tender). If you are buying 2 bottles of Salad Dressing and you have 2 coupons, you will only be allowed to use 1 of the same coupons in one transaction.  In this case, you could pay separately for each Salad Dressing in order to use your 2 coupons.

See what “Limit 1 Coupon per Purchase” means HERE