Rennur
When you add a new rule to a BO that belongs in a group, you are asked if you'd like to add this rule to all members of the group.
The option to add the rule to all group members is impractical.
In short, the BO name is not renamed to the name of the BO the rule has been copied into.
Example, rule Car.MaintenanceDate= copied to a Truck BO will remain Car.MaintenanceDate= instead of Truck.MaintenanceDate=.
So you have to go through all the group members and manually change the BO name to correspond to the BO name it was copied into.
Solution:
Display the question with option to rename the BO, the same way it does when you copy + paste rules from the Config tool BO tree.