You may have leading and/or trailing tabs instead of spaces which the trim's won't replace. You can use CHARINDEX to find CHAR(9) in a string and then use the replace function if that is the issue.

/****** Script for SelectTopNRows command from SSMS ******/

DECLARE @REALNAME varchar(255)

SET @REALNAME = ' Ricki Ricardo'

select LEN(@realname)

select len(RTRIM(ltrim(@realname)))

SET @REALNAME = 'Ricki Ricardo'

select LEN(@realname)

select len(RTRIM(ltrim(@realname)))