57 -> 60 ??

We knew that there were 57 kids selected in Chennai auditions last to last week and they will be competing in the next rounds of the competition. Last week it was Trichy and Coimbatore kids in next level of competition with 25 being selected. From the promotional videos for the Chennai's next level of comptition, it was bit shocking to hear "Chennai's top 60 kids". I donno when this 57 is changed to 60. I remember 2 kids Balasarangan and Roshan will join in the sets round in Chennai. So, it cant be these 2 kids to join the show. Is it with the kids who got selected in the first week of the competition when Junior Vs Senior take place. Lets see whether the show tells from where this 3 kids got added into the competition.