I posted the message because I have duplicate, but you need to understand why :

After the search result (from an author), i select approx 50 files to download (many album if possible).
But i didnt look very very well each title (impossible to spent one hour to select files)
And I select important files I realy want more than once because I cant manage the download process because i am doing something else.
So I selected some files more than once, please look at my example (morcheeba)
Then I go to job, and when i come back (10H later) i have approx 40 on the 50 files and some duplicate.

The post was NOT a "technical" post, NOT telling that there is a bug in Xolox.

It is a new feature request !