sumedha is out because Bhappida don't have trust on her and walked out when Mauli was out.He also told on Hungama that sumedha to thik hai par mauli ka jaana mujhe kuch jama nahi. So Mr. Bhappilahiri saheb is responsible for sumedha's elimenation.
How can a metor act like Bappida did is beyond me... How would he have walked out when Mauli was eliminated.. it was not as if Mauli was the only contestant in his Gharana... There was Sumedha... by walking out he showed how kind of a mentor he is.. imo He is not fit to be a mentor at all... Mentors dont leave their student mid-way throu the competition just cos their fav contestant is out...