US Immigration from Colombia

Hello, I have a bit of a multilayered question for those in the know. I (natural-born USC) and my wife (Colombian national) are, along with her children (my stepchildren), awaiting our interview appointment assignment at the Bogota Embassy for a CR1 (plus CR2s for the kiddos) after receiving the notice that NVC was transmitting the cases to the Bogota Embassy. She has asked me about obtaining three original copies of my (the petitioner) birth certificate to carry to the interview. I used my passport as proof of my status/domicile in the US. I did submit my birth certificate with the I-130 paperwork, though.

I am planning to attend the interview with her and the kids on their interview day.

My first question is: If I submitted my passport for proof of status/domicile for the NVC part of the process, do I need to worry about asking for additional original copies of my birth certificate to carry to the interview(s)?

My second question is: If one original copy of my birth certificate was used for each I-130 application, would I need to only bring the original and three copies, the original only, copies only, or...?

Third (bonus) question, if anyone can provide insight: Is there any way to request that my wife's interview and the kiddos' interviews happen on the same day?

Thank you in advance for any insight, and if I happen to have left out any information critical to answer the question(s) above, please let me know and I will gladly provide it. Cheers!

Now that my fianc has her fianc visa, as the petitioner, am I able to sponsor her aunt and uncle in Colombia for a tourist visa for them to come visit us? They raised my fianc , so they're pretty much her parents so to speak. The uncle is employed, the aunt is a school teacher, and they jointly own their home. Anything I can do for them?

I have been on the AOS process for more than a year and I am travelling for a week to Colombia to see my mom by the end of September. My passport expires in November and I am not sure if the US government will allow me back (even though I have permission to travel and am in the middle of AOS), because my passport expires in less than 6 months.

Has anyone changed their last name for the one of your future husband/wife before the actual wedding?

i've thought about doing it so I can change all my documentation in my home country, but my main questions are:

Would it affect in some way the visa process?

if not, would I need to do it before sending the I-129 package?

Thanks in advanced.

We showed up a little early and waited in the plaza. About 15 minutes before the ceremony, they asked the candidates to line up (probably around 20). I went in as an interpreter and had no problem as we did answer yes to one of the questions. (travel since the interview). An officer quickly viewed the questionnaire and marked the days of travel and sent us to another short line to a window where an Immigration Officer asked for the travel dates again, proof of vaccine (we had returned from our trip 10 days but that may not have been enough) and then for the new and old green cards. The Officer sent my wife to a seat with the packet containing the oath, flag, and said I could move an unoccupied chair next to hers. The ceremony was moving and I noticed that my sister and brother-in-law were outside waving and since it was dark due to an impending storm, they could watch the proceedings! The funny thing is that my brother-in-law is a federal judge and swears immigrants in from time to time! The Officer mentioned SSA, passport and voting information. After the ceremony they call the new citizens up and give them their certificates which you are supposed to check for errors.

I am glad we brought the vaccine cards as the USCIS Notice of Oath Ceremony does not mention them. However, the USCIS website says you can't enter if "Returned from domestic air, international air, or cruise ship travel in the past 10 days (unless you are fully vaccinated)."