I found that if the population drops below the level where it sets CostX to 0, and I save the sim, then load it again the CostX won't kick in after the population goes above reinstatement level. Check out this sim. Wait until population reaches 25 where I have set the reinstatement level. This caused overpopulation in my sim which nearly freezed it.
Also I found the values in the GUI is not saved with my sim. It would be useful if you could see the data I have set for my sim.