Multiple screens on laptop

I have fences installed on a laptop with 2 screens in addition to the main laptop screen when it is docked.  My issue is if I set a fence on one of the additional screens, and undock my laptop, it will move the fences to the primary screen.  OK...I get  that.  But when I re-dock the laptop, it won't out them back which means a couple times a day I have to reposition my fences.  Any ideas??