If you live around Tops Markets you can get a better deal with coupons currently available at Coupons.com.
Sale: 4 for $10 11.4 - 19.5oz boxes
70 cents off 1 Special K Cereal 4x (2 computers) doubled = $5.60 off 4.
so 4 for $4.40
Even if you don't have 2 computers you can still get a good deal if you print two .70 off 1 and use a $1 off 2 kelloggs cereal coupon ($6.20 this way)
Most of the time, you can just use two separate browsers to double dip on coupons. Use IE and then Chrome for the same site. I do that all the time.