Don't worry too much now.

My hu*****and also received RFE on his case. But it turns out to be some wording on the supporting documents by his company. The lawyer revised the document and our case was approved soon.
It may be also some trivial request on your case.
You may also go to www.immigrationportal.com to get some help. There is a special forum about the EB1 and NIW application.