The coupons they are sending us through email are different from the ones that have been in the paper. They have a unique code, and if you print out more than one and use it, when the waitress puts in the number, it will say already used, if it has been used.
I did notice yesterday that the prices went up on the steaks (and many other items). The salad bar is no longer included, and you have to pay extra for all the items that used to be part of the meal. You still do better with the coupon than without it..but not by much anymore.