how do i delete duplicates ?

EJ will hide duplicates by default. A duplicate it a different file with the exact same Artist and Song Title. If you want to get rid of them click at the bottom of the songlist to Show Duplicates (or Always Show Duplications on the bottom of Tools->options->Display tab). Then right click a duplicate song title in the songlist and select Edit Song. Now on the editor click Delete and "Only Delete from EJukebox".
While the editor is open right click other song titles and repeat the process.

thanks just getting time to work on jukey

speaking of duplicates which duplicate is displayed if hide duplicates is enabled? First, Last or Random

First is shown
when the next title is the same it is hidden

the first depends on if the songlist is sorted by title or album, track#,title