I don't really consider myself a coupon newbie because I've been using coupons for a while now. But, I've just recently (in the past 2-3 months) really gotten into it full-force. I just ran across this comment on a different site that I frequent (hip2save.com) by a reader named "Melissa", and I thought it was really helpful. I can't tell you how many times I've gotten confused or thwarted by cashiers because of this, and I didn't have the knowledge to back up my claim to use multiple like coupons!
Sometimes cashiers think ‘purchase’ and ‘transaction’ mean the same thing, but they are not. Each item you put on the counter is a ‘purchase’, all of the items combined are a ‘transaction’. Some coupons do say one per transaction, and that means just that – one per transaction. One coupon per purchase means if you are buying 2 items, you can’t have the cashier scan 1 coupon twice, you need 1 coupon per item you are purchasing.
This cleared up so much confusion for me. I think I'm going to print it out and put it in my coupon binder so that I can remember it next time a cashier gives me grief! :)