I have a couple of questions about ordering off Amazon.com: -I have a 20% off coupon. If I sign up for subscribe and save (15% off), can I still use my coupon and get 35% off? -I am looking at Pampers Cruisers size 3. When I click on it the picture changes to a box with size 5 on it. If I go ahead with the order will they be size 3?