TBH, I stacked and I don't feel bad about it. I applied coupons they gave me and the coupons worked. Should I read the fine print on everything? Sure. But I don't. It's not my responsibility to police Target's coupons. If they cancelled my order, I'd understand and not complain, but they didn't. All I did was type in promo codes and the codes worked. I didn't think much farther into it. But again, if they were like "nope sorry," I'd be like "okay cool, I get that".
I only bought laundry detergent and paper towels though, so whatever.