Question on Ranking Formula for Multiple Roles

Could you try splitting the roles in different brackets, i.e.(has_role("Emp")) || (has_role("admin"))

As we usually do for different parameters,http://community.lithium.com/t5/Rankings/Create-a-ranking-formula/ta-p/108837


But as per this thread, http://community.lithium.com/t5/Developers-Discussion/Rank-formula-question/m-p/30885/highlight/true#M327 what you have implemented seems correct, so try maneuvering it a bit :)