US Immigration from Jamaica

If someone enters the U.S on a tourist visa and decided to overstayed their visa and remain in the U.S 5 or 6 years. Can they file to adjust their status to permanent resident? Would they be able to petition for themselves or they would a family member to file the petition on their behalf?

I did a payment for my fianc to do the interview in Kingston, Jamaica for the k1 visa and I was charge $281.11 instead of $265.00 Has this happened to anyone else? Or is this just taxes they added onto the fee?

So my husband was approved for his removal of conditions, we have received every notice the USCIS ever sent, all of a sudden they say they mailed the green card and we never received that. So now we had to apply for a replacement, how long does that take, cause we need to travel out the country in August.

My fianc had his interview on April 29,2021, which I was present, during the interview the officer asked him if he ever got arrested he answer and said yes for weed when he was much younger in his teen but I wasn't aware of it so on the application I said no anyway she was very nice to us. But my question is will it affect him even though she ask us to provide the court documents for the case and he also had a clean police record, She also said because I came she didn't need to question the relationship and she gave us 221 g form to provide additional documents that we didn't have. Today he went to do his medical because it was done and I checked the status, so when I checked the status I saw one that said refuse and another that said ready does anyone knows what does this mean I'm worried

I have all the required documents except the job letter. I have been waiting for this job letter from my hubby job for the past 2 weeks(from the same day my hubby took the oath). I have gathered and copied all the documents including paystubs for 6 months, w2 and tax transcripts. Is the job letter a must? I have 87 days to respond to the RFE. Is it 87 days from the date of the letter or nah?