Wrong Alien number on H1B notice--What should I do?

I just got an H1B approval notice from California Service Center. But it has a different alien number on the notice from the I485 receipt notice. Should I contact the immigration attorney and ask USCIS issue a new H1B approval notice? By the way, I got my I485 receipt notice from Nebraska Service Center. I am wondering if different service center give different Alien number? Thanks