Pamper Nappies - Dissapointed

Unhappy with the Sleep and Play product. I have a 6 month old who has started crawling. I moved him to the sleep and plays think that it would be better because he is moving around much more. I have moved over for one week and have had 3 night changes due to a wet baby, even though I change him before going to bed. I have used Pampers for my first born and have been using Pampers for my second and this is very disappointing. I bought the nappies from a USave Shop in Lenasia South and not sure if they are counterfeit. Please assist.