The system is setup to do two different things...
You can have it count by developments or by copies...
If it counts by developments then a color copy is 3 color and 1 black and a black is 1 black. It should not do a process black unless you specify it to do so. On the other option a color is one click and a black is one click. This is a function that your setup or service department needs to specify at the time of setup. It depends on wheather or not you bill by developments or by click.
Hope that helps.
Graham