J.B.
Mine takes a nap around 7:00/8:00 at night, sleeps for about an hour, wakes up, takes a bath, we read a book, then have a glass of milk, then bed. It's usually around 9:30/9:45 when he goes to bed. He's been taking the late nap since he was about 2 months old and has been sleeping through the night since.
I would just try a later bed time and see what happens. I don't see anythign wrong with a late nap if it seems to help her. And it give you a break at night to watch your favorite program or grab a bite to eat.