JEE Mains 2016 counseling

Is there anything wrong with IIT JEE mains 2016 counseling?. The cut off for round 3 in 2016 seems to be way different than 2015 and 2014. How is it possible?

Sir/madam , i have been allotted a seat at IIITDM , Jabalpur and PESU , Bangalore , for the same stream , mechanical engineering.Which one of the above two is the better choice on the basis of factors like placements,faculty , ambience , exposure to industry etc.also is the mechanical degree offered at jabalpur the same a conventional mechanical degree offered by other colleges?.Please give me a honest opinion , as i will have to decide between these both soon.Thanks in advance!!!.

How long before the exams should students start preparing for JEE Mains ?