C0 is created from the master CC details. C1 from IT 14, 15.
It is not necessary to have CC for inactive period after termination.
Your issue is not clear.
If there is there a problem in posting, for a w/t from IT 14/15, or time w/t from 2002, etc, then it could be due to the CC split removed during payroll processing.
Run payroll with log display. Display log for the PCR where the w/t is output to RT.
See if the operation ELIMI is removing the split and if CC split is not reset; if so, then the proc class used in this PCR needs change so that CC split is kept.
Else check if there was a CC split in the input IT.
If not, go back to the first occurrence of the w/t in IT. From there down, see where the split is removed. Correspondingly the PCR or w/t config needs to be corrected.