Run TSSUTIL with the following:
REPORT EVENT(ALL) RESCLASS(DATASET) DRC(B9) LONG
Look for events with the following
R-ACC A-ACC SRC/DRC SEC
SCRATCH ALL OK-B9 CAT
The SRC/DRC of OK-B9 in the TSSUTIL report means the access was allowed due to a permission for the catalog dataset instead of a permission for the dataset to be deleted.
NOTE: When the LONG option is specified, there are 2 lines for each event. The second line will contain the resource class and name.