I have a number of unique indexes on my database.  When I import it into a DDT project, all the indexes imported as non-unique.  So I changed them all in DDT to be unique and then deployed the database.  Everything worked fine except 1 index got deployed as non-unique.  So I checked the DDT project and it IS marked as unique.  So I unchecked and checked Unique just to make sure.  I redeployed the database and the progress log said the index in question was successfully altered.  So I went into the SQL Server Management Studio and the index is still non-unique.  Checked the DDT project again and the index is flagged as UNIQUE.  Any idea why this index won't deploy as unique?

Thanks!!