please i need your suggestion on what look strange to me, i went for my visa interview yesterday scheduled for 8am but the interview started around 12:30 pm by a white guy in windows 6, and it was successful, the visa was granted this time after the first failed attempt two weeks ago, but the VO held my i-20 with my passport, after scrutinizing my sponsor statement of account, he said i will pick my i20 together with my passport at my pick up point after 3 business days. i don,t know why the vo is holding the i20, although my programme orientation is slated for 5th of Jan 2018. could that be a reason to do that? here is my transcript:
VO: Good morning
Me: good morning
VO: can i have your passpiort and i20/
Me: sure( as i passed it)
VO: have i interviewed you before (as he scan my passport)
Me: no
VO:where are you going to in the united states
Me: GSU (in full)
VO:what is your highest qualification
Me: Btech
VO:in Statistics? ( as he go through my profile on his system)
Me: yes
VO:Why did you choose GSU?
Me: i read a book on combinatorics written by a prof from the school, and i made up my mind to attend the prof's class.
VO:when did you finished your first degree?
Me 2012
VO: why did you decide now to go for master
Me: it is my dream from childhood to be a professor of Maths and i have been a Mathematics tutor of standardize tests for two different company since, i think this is the best time for me to actualice my dream and pursue my career.
VO: ok, Are you married?
Me: yes
VO:Did ou have kid?
Me: yes
VO: will you be going with you wife?
Me: no
VO: what does your wife do?
Me: she works for bla bla bla comp
VO: ok, did you do any exam
Me: yes
VO:What was your score?
Me: bla blas
VO: ok, did you have the score sheet with you?
Me: No
VO:who is your sponsor?
Me: my father, Mr bla bla bla
VO:what does do?
Me: petroleum marketer
VO: did you his account statement with you?
Me: yes (as i open the envelop and tendered it)
VO: he opened page by page looking at the transactions and typing at the same time for about 30 secs.) ok, your visa is granted but you will leave the i20, you will get it with your passport at your selected pick up point, as he picked a white paper and circled the address for me)

the same guy interviewed me yesterday and he did not return the soa and my i20 although he granted the visa

please i need your suggestion on what look strange to me, i went for my visa interview yesterday scheduled for 8am but the interview started around 12:30 pm by a white guy in windows 6, and it was successful, the visa was granted this time after the first failed attempt two weeks ago, but the VO held my i-20 with my passport, after scrutinizing my sponsor statement of account, he said i will pick my i20 together with my passport at my pick up point after 3 business days. i don,t know why the vo is holding the i20, although my programme orientation is slated for 5th of Jan 2018. could that be a reason to do that?