I-129F, RFE, Thailand

[Adam7745 0]

OK, freaking out (how unusual for this forum, right?) and wanted to start a new topic for this question as it's different from my last.

I received a RFE on my I-129F for forgetting to tick a check box - no big deal and I sent the response letter off today. Now when I originally got the text and email about a RFE, my fiancee thought it was because I neglected to include her name change document. She is divorced and changed her name back to maiden name. I included her divorce certificate as requested but my reading of the instructions was that: "Proof of Legal Name Change if either the US Citizen and/or foreign fiance(e) is using a name other than that shown on the relevant documents" meant it was only needed if she was currently using a different name from her birth name and that shown on her ID card, passport, etc...

I understand from further reading that she needs everything for the interview in Thailand, but I'm still not sure about the I-129F.

When I got my RFE for something simple, I relaxed since I figured they had looked and determined what was needed to finish the process and this was it. I have since read that this is not true, they haven't looked at everything yet, and that people can and do get multiple RFEs!

My questions are: did I make an initial mistake by not including that name change document and translation? Did I make a second mistake by not sending it with my RFE response with a letter explaining I wanted to include it with my application in case it was needed? Should I preemptively send a second RFE response letter with the document explaining that now? I just want to do whatever will waste the least amount of time and get this part of the process approved.