Enter find mode and select one of the values that appears to be a duplicate and perform your find
Then click into these fields and see why they aren't being treated as identical values. Perhaps there's a non printing character present in one of the records that holds this value.
You may need to enter criteria with Wild cards such as Director*of*Design
in order to find the records with the issue.
Here's another approach...
One trick to make it easier to find the problem record might be to import the data into a new table where you specify unique values on this field with the validate always options specified. This will automatically filter out duplicates during the import. Then you can hunt through the imported data for values like Director Of Design where 2 or more instances imported due to such invisible characters. I think you can then use a relationship from these records back to your original table so that Go to Related Records will pull up the original records with the problem data.