Youi can burn as many copies of a tune as you like. Just not in the same position in the same playlist after 7 burns.
I've never needed more than 7 copies of a specific playlist, let alone 10 so I've never tested the limits. But it seems that if you delete the playlist, create a new playlist with a different name and add back the tunes in the same order you probably won't have a problem.
Not Good: Jobs Changes The iTunes Rules