ESA Decision Letter

i just got my decision letter from the dwp and it says as follows;

to be placed onto contributions based esa and to be placed into the support group

no mention of how long for?

it says that they will continue to pay my ni credits to qualify for the benefit in the future

it then says the following about monies;

living expenses £71.00
support group £34.05
top up payment £5.80

i says it will pay me this amount from 21 december, but i though the support group was more money?

confused, but happy though

thanks for the advice :)