Exporting Incorrect tracks onto USB

When EXPORTING my playlist on Rekordbox 3 onto my USB i get an ERROR MSG saying "one or more files were not exported, check the log files in the "Document" folder Export Log 2014-10-24 txt - And if i have 10 tracks in my playlist the tracks get replaced by other tracks and new artwork so the original 10 tracks in my playlist are now a brand new batch of other tracks......what is wrong with 3.0.2????