AH! But you can still do the lube/free dinner thing and then use your food stamps for more free dinners.
I've never understood the whole multiple coupon thing. On the back of my coupons they say "Only 1 per purchase" or whatever rendering my second coupon useless. I know I'm doing it wrong and learn how to do it right since the government only gives me 900 a month for everything. Can't get food stamps because cost of food is included in the 900.