1. Do not renew online ...use the paper forms
2. Take card of the child support issue
3. Have a lawyer help you with this.
If you are low income go here: www.justice.gov/eoir/probono/states.htm or http://www.immigrationlawhelp.org/
Immigration is federal (national) law. ICE operates on a national level. There is no such thing as 'jurisdiction' when it comes to investigating a case.
Thus, they can assign as many officers from as many offices as they wish. Many times it makes more sense for the same officer to interview all the people ... rather than have a 'disjointed' investigation.
It is not our place to be concerned as to how they do their job.
Does this answer your question(s)?
My colleague is correct. You need to do more research/homework (reading the law/form instructions) rather than asking questions on a blog.
Or, you can meet with an attorney, several of us have learn-how-to-do-it-yourself consultation services.
QUICK ANSWERS ... the affidavit of support isn't needed as part of the I-130 package. I will also say that phone 'chats' do not generate documents and carry ZERO weight with CIS ... do you send birthday/holiday cards? Bank transfers of funds? do...