I’m using TotalFinder 1.6.2 on Mavericks. When I toggle dual mode the right side window will randomly display the sidebar on the left side of that window rather than the right side. If I toggle dual mode off and back on it corrects. This is totally random. I can work in TotalFinder then change the focus to another program and come back to see the problem at random times. I have not been able to reproduce any particular activity that is causing it.