"Smart" Playlist function Rekordbox 2.2

When I make a smart playlist (not sure how it's called in the english version) I make sure it will select every track from a surtain genre. Then I export that list to my USB. When I load rekordbox a few days later to update my library I discover that my smart playlist didn't remember it's presets it's back blanc again.

So when I use the automatic sync feature, it immediatly starts to delete my playlists on my USB because the software isnt remembering its presets..

Am I doing something wrong here ?