Have you tried looking at the value while simulating? If you start simulating (Hit play in the editor) and hit V a couple times, hit Shift+F1 to regain the mouse cursor and then, without stopping the simulation, look at the values, does it show a difference?
The values shown in the editor are normally the default values that the variable will have as soon as the simulation begins, so anything set up in the event graph will only affect it while simulating.