Depends how you set it up I think but that sounds about right.
The important thing to know about working with raw files is that DPP doesn't actually alter the file, it just saves the instructions for how to do it.
In practical terms that means you can go back and re-do something later on and you have not damaged any of the data in the CR2 file, it's a bit like having a negative that you can print off in lots of different ways.
So the good news is you can experiment a lot with the controls and still get back to where you were when you started.
Have fun.