Hi

Are you asking for CSAB Special rounds? Well, relax back. The seat which you have been alloted in/ till the Round 7 will retain. there is a provision now a days for so. In case you do not get a seat in CSAB Special round, you can always return to your previously allotted seat. One thing to take care of is that the fees for the CSAB Special rounds are non-refundable.  

For more information, do visit the JoSAA 2019 Official Site.

Best of Luck. 

Hope this helps.

Cheers!