Since a clan challenge result tweak was introduced (see Thread 205309), a problem has been reported which has now been confirmed regarding the scoring of some drawn games in clan challenges.
As a result all challenges scored beyond the date of this change will be reviewed and rescored, so you will see some changes to clan totals when this takes place.
This will take place later next week, so no immediate changes will take place.
I detailed breakdown of the issue and the fix will be given when this process completes.