H1B, H4 Visa

I had my visa extension stamping at hyderabad on july 30. After initial formalities..I was in the line for my interview. One indian guy sitting at the window and american lady assisting him..I think she is training him...
These are the questions they asked...
1. highest degree
2. which company and what I will do
3. client name
4. where i will get down(they are looking for the same thing as we enter in DS 160)
5. recent paystubs
6. I129 and LCA

After that, they discussed something which I can't hear...then asked me to sit for a while for furthur questions....they kept all the docs along with passport and I797 with them..so am little relieved..

After 15-20 mins of waiting they ca\lled me again in a separate room where they can interview only 1 person..its a closed room...then one indian lady came with paper and pen along with my documents which they took initially...she asked number of questions like:-

1. what is my job...
2. client name
3. what is my role and my responsibilities...
4. who referred my company and what is his name..(She is actually observing my reaction time and watching my face expressions...)
5. who sponsered my H1 and whether I paid it or company....
6. why premium processing..who paid the amount...
(I just told company paid it)
7. client letter (I don't have one so told that client is getting annoyed and fired couple of ppl as well...so I am afraid asking them and I dont have)
8. After that ..somehow topic diverted abt my fee for h1 premium processiong....
9. she asked abt my responsibilities in the job on a paper either from my company or client....I just gave my resume as i cant find the documnet at that time

she went inside....and after 3-5 mins....one more new VO who is a lady came with something like visiting card. I looked at it and it has something like "fraud verification ** " ..she told that she is doubtful abt my company and i need to do something.....at that point...I just showed all the paid bills which my employer paid...she somehow got happy with it and justified that my case is right....I am just looking puzzled at whats happening and did not talk anything....she told that I have no problem and entered something in the system and told that my visa got approved and kept my passport and I797 with her....
Actually my health is not at all good and they got suspicious in my case...I somehow managed to tell something all the time...

They did not ask my W2 forms nor my clinet letter intitially..they asked client letter during second round....

To my observation...thjis is what happening at hyderabad for H1
...New stamping...paystubs ----SURE
  highest degree
  LCA and I129
  where do u work and what are the responsibilities

H1 extension----all the above with W2 (though they did not ask me)