Stored Procedure Retrieving Duplicate Data

Hi i have the following stored procedure which should retrieve data, the problem is that when the user enters a name into the textbox and chooses an option from the dropdownlist it brings back duplicate data and data which should be appearing because the user has entered the exact name they are looking for into the textbox. For instance

Pmillio Jones

Pmillio Jones

Pmillio Jones

Robert Walsh

Here is my stored procedure;

ALTER PROCEDURE [dbo].[stream_UserFind]

-- Add the parameters for the stored procedure here

@userName varchar(100),

@subCategoryID INT,@regionID INT

AS

SELECT DISTINCT SubCategories.subCategoryID, SubCategories.subCategoryName,

Users.userName ,UserSubCategories.userIDFROM Users INNER JOIN UserSubCategoriesON

Users.userID= UserSubCategories.userIDINNER JOIN

SubCategories ON UserSubCategories.subCategoryID = SubCategories.subCategoryID WHEREuserName LIKE COALESCE(@userName, userName) OR

SubCategories.subCategoryID = COALESCE(@subCategoryID,SubCategories.subCategoryID);