There was a guy at the desk who printed off my 'unofficial' scores. They did not change.
I don't remember if I had the option to audit or not, but I believe you could at the computer before you got up and left the testing room. Once you leave, you can get your unofficial scores from whoever is working at the center before you leave. Actual scores take around 30 days to become official.
There's a place on Optomcas to input scores. I believe you can check a box that says they're unofficial as the real scores are mailed to them directly.