L.S.
Waking up at a certain time in the morning can be a habit and it doesn't matter what time she goes down at night. My son always wakes up around 6 but goes back to sleep until around 8:30 sometimes 9:00. Last night he woke up at 5am with a wet diaper and clothes, i changed him and his clothes and he laid in bed with us for 20 minutes to relax and then he went back to bed until 10am. So it is the 6 am habit that will need to be broken. You could go in and do the sleep training thing again. Shhhh, it isn't morning time. It is sleepy time. Go back to sleep. Of course she will cry but this will have to be learned over time. My son sleeps from 9pm to 9am (give or take an hour either way). He has one nap (he is 19 months) from around 2:00 to 4:00. If I hear him early, I ignore him unless he is screaming, which means he is soaking wet, but it doesn't happen often. He sleeps in a size 6 diaper usually and wears a size 5 during the day. Does she wake early because of a soaked diaper? If so, go up a size at night. My son also drinks a bottle of milk around 8:30 and eats a late dinner around 7:00 or so. If he has an earlier dinner, he'll eat a snack. She could be hungry. good luck.