Extra commit and rollback counts added by Toad but not seen in the Command Line Processor (4244764)

If you run the following statement, there are differing commit and rollback increases, whether run in Toad, or in the Command Line Processor (CLP):

select COMMIT_SQL_STMTS,ROLLBACK_SQL_STMTS from SYSIBMADM.SNAPDB

- When you execute this script several times in Command Line Processor with commit, the count of commit and rollback increases by 1.
- When you run this statement several times in Toad for DB2, with the Autocommit option On, the count of commit increases by 3 and rollback increases by 2.

What is the reason for the differing behaviour?