Duplicate Row Filter is not filtering out duplicate values and labels everything as unique.

[mlauber71]

You might benefit from this article and example workflow

School of duplicates - and how to deal with them

Dealing with duplicates is a constant theme with data scientist. And a lot of things can go wrong. The easiest ways to deal with them is SQL’s GROUP BY or DISTINCT. Just get rid of them and be done. But as this examples might demonstrate this might not always be the best option. Even if your data provider swears your combined IDs are unique especially in Big Data scenarios there might still be lurking some muddy duplicates and you should still be able to deal with them. And you should be able t…

Also if you try to de-duplicate string variables you do not have any blanks at the end or hidden characters that would seemingly equal strings different in the end.