OMG 2 days...I feel so sorry for the people.
BLS center is big mess and fraud. they are purposely make you line up, I have been there 3 time early in the morning 5pm and corrected silly things like one point I mention Canada, and they said I can't use Canada as its not in my address seriously, and they ask my a month new born finger prints to be corrected as this child not even has proper skin tone and how come he will have prints, just common sense. they are all making money there, I even thought I have everything, but these people are so good at finding mistakes out of good application, that I have uploaded one extra documents and asked me extra money to correct it.
Thing is they make you suffer like anything and in the end they offer you paid service where you won't insist left no choice other then suck it up.
One point I went to Consulate General of India, Toronto, Canada l they have more then 70 people lined up and all done with in 1 hour of time frame can you believe there are only 4 people and finished in 1 hour and these BLS they allow only 10 people and 90 percent documents they reject and the time they spend on finding mistakes. making every single person life miserable. the more they can do they can get salary. as if every one gets OCI and visa there will be no people to visit BLS and less people working less salary. I have no clue but it looks very obvious.