I submitted feedback about this on the G+ page, wondering if there was any way of getting around it for now. The 3 circles they set you up with, friends, following, and family. Are always at the top, then circles you create are underneath that in alpahbetical order. Any way around this, i tried recreating my own circle named family, but it still ended up on top of the others. Not really a big deal, but it bothers me now that i am starting to add a few more circles and want to actually use the sort feature on my newsfeed.