Calculation of days in custody

bail is granted in cheque bounce cases , but still in custody in 420/406 case. then what ?

Bail granted.    Still in custody?    Explain.    Couldn't furnish sureties?      Moneyless?

Bial was granted in cheque bounce cases , but not in 420/406 FIR , still in custody in FIR . 

And sir ,

what if there are multiple 138 NI cases , in 1-2 cases the person is on bail , and in others neither the person has yet been produced nor production warrants are issued .

The main question is :

Custody of one NI ACT case would also be counted in other NI act case , or each case would be seen seperately for the purpose of calculation of custody.?

in case where custody is more and the person is aquitted , & where custody is less the person is convicted , will custody of the 1st case in which time spent in custody is more will be adjusted in the 2 nd conviction.

Sir , my family member is still in judicial custody in FIR u/s 420/406 and there are a few 138 Ni act cases also , he had suffered business losses after demonitisation , and could not repay creditors , because of which people filed many NI ACT cases and an Fir also , we have a professional lawyer for our case , but on these points i wanted some more information . 
Thanks for your time and advice.