Strategies are not being assigned to customers

Hi,

Please advise in below mentioned scenario of Oracle collections

as part of a new OU addition we had to create a new strategy to accommodate dunning letters

we have created a new strategy and added required work items and strategy least applicable score given as 0 later ran Strategy harness program and then Strategy assignment

but unfortunately new strategy is not being assigned to customers but, default strategy is being assigned since we have a default one it should be picked up when no strategy but its being assigned though be have one new strategy, I did end dated the  default one and tested then no strategy is being assigned to customers , we have skip default strategy profile option set to Yes