Wow, Nikad, sounds like a real bummer. We went through this 2 years ago when our second son was born here in Argentina (our first son was born in the U.S.). I am a U.S. citizen (by birth) and my wife is Argentine. I needed all the same documentation "proving" that I had lived in the U.S. for 5 years. I carefully read and re-read the documentation required (all dates of foreign travel, etc.) and thought, for a person like myself, who had been living in the U.S. but regularly traveling out of the U.S. for 20+ years, this is impossibly ridiculous. I emailed the U.S. embassy here in B.A. for a clarification and received an email back stating exactly what appeared on their websit, all travel dates, blah, blah, blah. I forget exactly what I did, but I basically wrote a narrative or outline saying where I was born, went to school, worked etc. (with the dates) and then said something like from 19xx- 20xx I made numerous trips to South America, Asia, Africa, etc. for business, etc. We had no problem and in fact the women said they had never received such detailed info. The thing that I later realized (which could be very important in our case and perhaps yours) is that a child of at least one U.S. citizen parent, born outside of the U.S. is not granted citizenship UNLESSS one citizen parent can prove/demonstrate that they have lived in the U.S. for more than 5 years. So, that means my son's children (if born outside of the U.S.) will NOT be granted U.S. citizenship unless my son has been in the U.S. for five years. If my son ends up basically living in Argentina but maybe goes to college or grad school in the U.S. or does and internship and then returns to Argentina and has children, the ONLY way those children will be granted U.S. citizenship is if my son can prove (probably with U.S. entry/exit dates in his passport) that he has physically resided in the U.S. for the 5 years. On one hand it is sort of logical, no sense granting citizenship to an individual who was not born in the U.S. and whose parents never "lived" in the U.S. This could be perpetuated for generations of people that have never set foot in the U.S. Anyway, I would definitely not give up, just take a few minutes and write as much detail with dates as you can and try again. Also, we have learned to travel with a large folder with all passports, all birth certificates (translated, with apostle, etc.) marriage license (only one of those), etc., etc., etc. Disclaimer, I am pretty sure what I said about citizenship is true, but I am not an attorney. Good Luck.
) otherwise you'll pay 15% more 
