I have always had Workspaces 1,3,5 etc on the left hand side monitor and workspaces 2,4,6 etc on the right hand side monitor. Having upgraded my nvidia drivers and i3 (4.11), I start i3 and have workspace 2 on the left monitor:
as opposed to
W1 W2 (as I always had with i3)
What do I need to do?