To match your iTunes playlist order to your iPad do the following:
1) Select and open the playlist on iTunes you what to manage.
2) Place the songs in the order you want (for example, alphabetically).
3) Press and hold the "Control" key on your keyboard.
4) Click on that playlist on the left hand side.
5) Select "Copy to Play Order".
That's it! Whenever you add or rearrange the song's order to a playlist on iTunes it's good idea to follow the procedure above. For an iPod I don't think it matters but for devices like Apple TV and the iPad it's necessary if you want the same order as in iTunes. If you don't do this you'll notice that all new songs will be listed on the bottom of your playlists. I hope this helps.