Bcoz buddy Airtel Digital TV on its own cannot shift a channel to different LCN or genre, permission from respective broadcaster is required.....at tims of signing agreement these channels were placed in designated genre hence in order to shift them it would require changes in agreement to be done and as carriage fee varies for placing a channel across different genres hence usually such changes r made on request being received from broadcaster or when there is urgent need to do the same.
As far as Chumbak TV is concerned, broadcaster seems to have deliberately placed it in hindi movies genre and Sansad TV Channels were earlier available in Hindi News Genre but in order to free up LCN Slots they were shifted to Infotainment genre.....also E24 is available in Hindi GEC genre and Zee Anol Cinema is still available in Bhojpuri Language Genre so what u have stated above is incorrect