SAP created a hot news, because the reorg job for batch jobs "sometimes" - obviously somehow in the support packages SAPKB46C50 und SAPKB62050 - deletes a lot more than expected and therefore deletes data.
So, it is strongly recommended to use the report RSBTCDEL2 instead of RSBTCDEL as of 4.6C!
You should change your Batch-Job-Scheduling accordingly.
Unfortunately this note does not consist of any useful english translation - even when this is a hot news ...
( RSBTCDEL, RSBTCDEL2 )