H1B, H4 Visa

I had my visa interview on 16th in Chennai at 11.30 PM on 2/16.2017.Here are the set of questions.

My profile: Masters in US , graduated in 2014 december, worked on OPT till oct 2016. H1 from october 2016. Changed two employers during OPT. ALL FTE and now working for a healthcare giant with six figure salary. Totally 5+ years genuine exp with masters!!

VO: Good Morning
Me: Good Morning , how are you officer?

VO: I am good.Thanks. Pass me your passport
VO: Who is your petitioner?

Me: Answered
VO:Whats your designation?
Me:Answered

VO:How much is your salary?
Me:ZZZ,ZZZ
VO:Nice!!

VO:Whats your highest education?
Me: Masters at Univ in USA. Mentioned University name

VO:What were you doing in May 2015?
Me: Was working for this employer.
VO:You mean , you were working on OPT!!
Me: Yes

VO:When did you come to India?
Me: Feb 12th

VO:After looking at screen for 2 mins, your visa is approved.But, your SEVIS id is missing some info. It will take couple of days more to get processed. Usually our time frame is like 3 days. It might take like 5 days. When are you heading back?
Me:March 5th.I have my tickets booked!!
VO: You should be okay!!

VO: he gave blue slip with case number and said if it gets delayed contact this number. It has the option ticked your visa needs more administrative processing!!No docs were asked... He kept my passport..

Me:Thanks.
VO: You are welcome..

I am really worried now. Has anyone faced this situation. What might be the issue with SEVIS id?Even my i20 shows change of status!!

Any replies would be gladly appreciated!!