I was recently working on a project where I needed to be able to sort a nested relationship query. After searching and asking, I could not find a solution that would be easy to apply, but I did find a way to do it, thanks to a video from Touchdown Tech. It turns out the order of the values depends on how they are ordered when the relationship is created. This is not ideal for a data-driven website, and I will submit requests to Metabox and Bricks.