Also I had 2 more questions, One was on payments you did to the State dept- DV, did you write both names under one check, or different checks but under one principal. The second question was during AOS do you also file 2 different 1-485 for adjustment of status or.
As Capeolive said, you have to send two separate files along with I-485 and two separate checks with AOS processing fees ($1010*2). Please check for the latest forms and latest fees from USCIS website when you send the AOS package. When it comes to DOS fees, you can write one check for both and send it along with the form you received with 1st NL. In the form you have to indicate the number of people. It's better to send DOS fees in a cashier's check or a money order. We didn't write our names but the case number. After July 13th the new DOS fee is $440 per person. You can confirm the amount by calling KCC.