Does it show which duplicates are removed, or is there a way to display them ?
Traktor will always remove the second (and subsequent) instance(s), never the first.
I was 99% certain this was the case. Thanks for confirming.
No, but why does it matter? If you have two identical tracks in a playlist, and I mean identical - two instance of tracks with the same Traktor ID, then why does it matter which on is removed? The only reason I can think of is if you have a created a specific sequence and Traktor removes the second instance and not the first perhaps?