Skip reducing powder in 2kg bags

I have always prefered Skip washing powder to other detergents as it does not irritate my sensitive skin, however, I have noticed that there is less powder in their 2 kg bags then there should be. I first noticed this after I bought it last and assumed my bag had a hole in it but now I am certain there is just less powder inside as I checked for tampering and then weighed it when I got home to find it was only 1,8 kg.