Adjustment of Status Confusion !

[Prince 1214 0]

Dear VJ Fellows,

I am ready to apply for Adjustment of Status after my K1 Entry out here in United States. So I have some confusions regarding the case, which are as following:

1. My fiancee is sponsoring me and filling I-864 for me to be submitted AOS. Moreover, my Father In Law is my Joint Sponsor for my case. So my Fiancee lives along with her parents (Father In Law) but she is above 21 and filling her separate Tax Returns and she has not been included in my Father In Laws household. She is independent tax payer. So in this case, which form shall I fill to attach my Father in Law's Sponsor. Either I-864 or I-864A ? I am bit confused with this issue.

2. Secondly, I didn't get any of the Vaccination Record and they didn't even vaccinated me, they simply said, you don't need it. Now when I needed DS-3025 for my I-693, I had nothing to show to the doctor. So doctor repeated whole of the medical exam again and vaccination done along with the chart. So I needed to ask that as my old medical has not been expired yet and I have repeated my Medical Exam again to fill I-693, so would it make any problem for me or would it be fine to submit the new medical there on I-693 along with Immunization chart ?

3. Is it neccessary to file I-131 (Advanced Parole) at the time of filling AOS ? I mean, I have just been here in United States and doesn't really Intent to leave but I might also leave in case of any emergency later on. So what date should I write in Part 3's 1st Textbox (Intended Departure Date and Duration). Should I enter any of the assumed date or would I have to leave exactly on that day ?

So all of these are the confusion, kindly help me up with them. It would be really helping for me. Thank you !