US Immigration from Jamaica

Does anyone know at which stage dna is requested for adult children?

After sending all requested documents, I keep checking on the status of the case and up on checking this is what I saw. Should I be worried or just wait

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.