How to Delete Rules after deployment in EPCMCS

We are working on EPCMCS ASO cube and written rules and deployed. A duplicate rule is getting created when we rename the existing rule and deploy it again. Both the names are showing up in front end. I cannot delete it from front end or backend. If i am deleting from Business rules, it is deleting from Business rules but not from repository. There is no option to delete from Homescreen BUsiness Rules option.
Unlike EPBCS, its not even showing the option to "delete from Repository" check box while deleting from Navigator → Business Rules option.
Can anyone let me know how can i remove all deployed rules