It's not doubling or tripling if you have to do seperate transactions. What doubling is is when you have 2 coupons for one item, one from the store and one from the manufacturer. For instance if I went to the commissary on post and had a $1.50 off huggies coupon from the commissary and a $2 off coupon from huggies and used both on one pack of diapers I'd get $3.50 off. One transaction, one item, two coupons. I don't think anywhere around Fort Sill or Lawton does it tho. I could be totally wrong tho! I'd love to get more into couponing so it'd be awesome to find out if any stores actually do it!
I know exactly what you mean I have been doing that at walmart. If you go to www.coupondad.net He has some great tips and tricks on this whole coupon thing. He also has the walmart coupon policy up there because every store has a coupon policy all you need to do is just call them and ask them about their policy. Hope this helps!