Just tried to play the code map for today (Very hard on Med/High) and when I tried on Med/Low, I noticed that the build direction has changed/ Is this WAD or a bug?
I've seen this on numerous maps and appears to be by design that the build direction can change based on map size/complexity.
It's more WAC than WAD... it was one of those things where I just let the river flow where it wanted rather than fight it.