I can use more than one coupon when they have several in a paper. Also, I have two circulars mailed to my house; one in my name and the other in my partner's name. This way I always have more than one coupon.
Just remember to use both sets every so often to keep them coming. You can also go to the customer service counter and have them scan the coupon even if you don't use it to keep your mailing active.