How are sprint swimlanes sorted in Bauer User Story Map, and how to resort them?

[Donald Wong]

I'm trying out Bauer's User Story Map AddOn, and when I visualize the Sprints on the row, I get a seemingly random order.  I would expect Sprints to be shown from earliest to latest, with Others (unallocated to any sprints) at the bottom.  

1. What is the criteria for sorting the sprints in the swimlane?

2. How do I change the sorting criteria?