As I have always said putting castes in OBC or SC/ST category has always been a political decision and depends on the number of votes that any community can provide to a ruling party. Jats have some 33% votes in Haryana. It has no connection with social heirarchy.
The five groups mentioned are Jat, Jat Sikh, Tyagi, Bishnoi and Ror.
None of these groups have ever been called Sudra by any brahmin or historian in Haryana or Punjab.
Further, looking at each case individually Jat is here due to political clout. The others are here just to provide legitimacy to the reservation for Jats so no one raises a finger saying how selfish of Jat politicians.
As it is, Tyagi, Bishnoi and Ror are included here just for lip service. First, Tyagi and Ror here are clearly from the uppermost places in the caste system. Second, Bishnoi is a religious sect and not a specific caste.
I'm also sure these groups will never get their share of jobs through this scheme. Whatever 5% or so jobs are being reserved for these 'special backwards' will all go to Jats, most probably.