Bests & Worsts Reviews from Amazon

I've got a pair of dockers that are a 36 inch waist. I've put on a little weight but the 36in waist still fits, just a bit snug. Given that, I thought I'd order a 38 in these shorts and they'd be a nice solid fit. Instead, they are nowhere near buttoning. Basically, a 36 in a Dockers is the same as a 32 in Amazon. How is it possible that they are so bad at measuring? In any case, order at least 1-2 sizes above what you need on these horrible shorts.