As Timeline Layering

[Anonymous]

Hi All, 

I've been using the "As Timeline" by Pragmatic Works very successfully for some time. 

However, I've come up against a requirement to layer two tasks on top of eachother, a forecast task and an actual task. 

When I turn "Stacked" off in the behavior section I get the desired outcome except that the forecast bar is on top of the actual bar, whereas I want it to be the other way around. The actual bar on top of the forecast. 

Does anybody know how to control the layering with this visual? 

Thanks!