Your attorney is stating that probably the DS3032 is not needed as Everything will be going to his office as it is the address of record You should call your attorney instead of corrsponding via e-mail, you will need to tell him that your wife is in China and ask him how he suggests she get the signed forms and return them?
The DS 3032 is simply a from signed by your wife to designate a represenative & Address for all future communications and correspondances. I think his reponse was regarding your inquiry about the DS3032, it doesn't seem like he is screwing around with you, it does seem as though there is a communication breakdown between the two of you, which can happen via e-mail if the e-mails are presumptive and vague.
When ever you use an attorney everything from the USCIS will go to the Attorney first, since the law office is your representative of record & will receive all notices and correspondances,
I suggest you pay the attorney fees and then make out a seperate check to to NVC for filing fees,Ask the attorney to fax you a copy of the NVC bill! The canceled personal check serves as another record for your case.
see the link below for info on the NVC visa processes
http://travel.state.gov/visa/immigrants/types/types_1315.html#6b
It would be ideal if USCIS & NVC would send everything to you instead of to your attorney then you. The disadvantage of dealing with an attorney is all this delay, it would have been easier if you did things yourself and had everything mailed to you!
As the process takes long enough without them sitting on your case!
Stay on top of them to keep things rolling.
I would look at the official USCIS & NVC web pages or other questions
www.uscis.gov
http://travel.state.gov/visa/immigrants/types/types_1309.html