this is to do with the "neutral position" and "distance factor" in the tracking settings. by default these are set to the center & dimensions of your primary monitor. if you want it to be on your second monitor, move the neutral position until the crosshair (visible inside the window when "show layer bounds" is enabled in preferences) appears where you want the center to be.
you can also just increase the distance factor so that the tracking covers both your monitors.
alternatively, tick the "follow window" option under tbe neutral position and then (optionally) reset the neutral position so that it's centered on the rahituber window. then the tracking will always be centered on rahituber wherever you move it.