Autotask 'auto optimizer stats collection' and scheduler jobs logging
Try
select sample_size from dba_tables where table_name='PS_JOB';

What does that return?
If that number is not as expected, is it possible another DBA used something like DBMS_STATS.SET_GLOBAL_PREFS
in this way for example:
EXEC DBMS_STATS.set_global_prefs('estimate_percent', '20');

instead of using the default of DBMS_STATS.AUTO_SAMPLE_SIZE? (which may be more than 10 itself)
That figure of 20 would change it from the traditional default of 10.  However AUTO_SAMPLE_SIZE will have Oracle determine the value and that may have been set, and Oracle chose a value larger than 10.
I am also in the dark about 'auto optimizer stats collection' and exactly how it has been working internally since 11g.  We have some windows though (8 total) that run for longer than 3 hours of stats gathering on our production databases.