G7 Problems w Shooting and ISO Dials

Hi, I recently sent my G7 to the authorized service center in Elk Grove to have dust cleaned off the sensor. When I got it back, I couldn't access Av or Tv from the shooting modes dial and from the ISO dial I could only access 80, 400, and High. I sent it back to them and the camera was shipped back repaired seven days later. (the cleaning only took one day). A week and a half later, I have the same problem. Does anyone have any idea what is causing this. And is it going to be a re-occuring problem. This never happened until I sent it in to get cleaned.

Thank you
Bob

Is it still within warranty of the repair? I would send it back if it's at no cost to me.

I'm definitely sending it back, I just want to know why it's happening and if it is something that's going to be an ongoing problem.