Hi,
Please refere to the next KB article related Creating or editing inventory rules http://www.symantec.com/business/support/index?page=content&id=HOWTO93595
There is a note (this may resolve your porblem):
The , , operators apply to the rules, which reside under the corresponding operator in the expression tree in the left pane. The rule does not work, if the operator and the rules, to which it must apply, are on the same level in the expression tree. Please see the example of correct usage of the Or operator below:
Regards,
Dmitri