I had 400 and something songs on my iPod but then when I tried to put a couple more on it all got deleted what happened?

Your iPod might automatically sync with your computer. If so, any songs you delete from your library will be deleted on your iPod too. Either make sure that you don't delete songs after you load them on, or change your settings so that it doesn't sync.

If you didn't delete the songs from your library, then it could just be a glitch (they often don't repeat themselves), so try again.

Good luck!