This is a response from Robert Kaufman concerning Kona Cottons. I'm am going to include a link, please please go read this ANYONE CONCERNED about the differences they are complaining about. If you send in a small swatch of the fabric you are noticing a difference in, they will analyse it and for your trouble they will send you a little something something. Hope this helps!
http://www.swatchandstitch.com/all-a...na-cotton.html