Thanks guys for sharing your case details.
RChak, if I were you, I would hire a lawyer as your case is not straight forward and the lawyer can come handy during interview process.
I informed INS of job change to keep things clean and avoid any complications. Hopefully they will schedule the interview soon.
Judging based on your cases, looks like there isn't a method to this madness.
BTW, my online message is the following:
On December 9, 2003, we transferred your I485 Application to Register Permanent Residence or to Adjust Status to our office in SAN JOSE, CA for them to schedule and conduct your interview. Scheduling can take several months. Our office in SAN JOSE, CA will notify you when they schedule your interview or take other action on your case. If you need further information, please call the National Customer Service Center at (800) 375-5283.