I would call them as , I'm so sick of them pulling this crap. They did the same thing to me with the robitussin deal. I went to another walgreens and asked for a manager and he had no problem and took all 3 coupons and I got my rr back.
Maybe they ( walgreens) need to get a memo on what " purchase" and " transaction mean.
Let us know what they say if you call them.