From my experience a coach might point out kids that should be separated based on some legitimate criteria hoping for a more favorable bracket. However the when that requested separation is made then the rest of the bracket is shuffled.
For example it could have been Moses Lake that requested separation from Strasenberg if they both meet criteria and both have higher previous placings than someone say Sipilia. So they got the separation they wanted but then ended up with their side stacked with Duran, and Sipila.
But I could be full of it... and often am.