Mine too wont go into deep sleep till after 9pm. That seems to be the magical number for her ever since she was a newborn. I just put her down at 8pm and sometimes I have to re-settle and sometimes I don't. She usually sleeps till 5-6am and I try to hold her feed off till 7am. I give her the last feed at about 10-10.30pm and then I go off to sleep for at least 5 hours (I hope anyway). Getting her to bed early just does not work for her. maybe when she is older.