I485 was transferred

My I485 was transferred to a "local" office. From the website it says it was transferred to MO. I called the national information cell, the automatic message told me it was transferred to Chicago, Illinois. I used to work in Illinois. Now I moved to Minnesota. Why is it transferred to Minnesota office? Should I call to change it to my local office. Does this transfer mean I will get an interview. How long do I need to wait. Thanks a lot for your information.