Dont feel bad, as you are not alone! My son went through the exact same thing your daugther is now going through. Got a lot of great advise but NOTHING, and I mean NOTHING worked for my situation. But hopefully for you, something does work as it can be frustrating!
My son use to be a great sleeper by 1 month. He slept from 10p till 8a every night. Then at 6 months to the T, he did what your daugther did. At this time he was asleep by 7:30p. He use to fall alseep on his own (always swaddled or he would wake himself up from his active arms or he'd grab his pacifier out of his mouth and wake himself up).
Now he needs assistance to fall asleep for naps and bed time. He would wake up by 10:30p, cry, loose his pacifier. Then again at 11p. Then he'd fall back alseep until 1:30a, then 3:30a then 6:30a. Then finally awake by 7:30a. His naptimes decreased drastically. From 1 1/2hr to now 25/mins if im lucky.
A lot of moms told me teething. NO because he finally got his first tooth at 11 months old! Nightmares/Terros, its possible! Everything I have tired has not worked for him. One mom did suggest putting him down at 6:30p. No possible with my work schedule (i am a nanny and he goes with me) and daily I feed/clean/exercise my horse. So i have to stick to my 8:30p bed time. However, my son does fall asleep for a nap at 5-6p for 1/2hr only. So he gets a late nap sometimes.
Do what works best for your family. Do everything you can. There is a book but I don't recall the name (its for moms who don't do the CIO). But everything in the book, I do. NOTHING has helped. Overtime though, he wakes up later once he is down for bed. But I have yet to get past the 1:30, 3:30, 5:30a crys and restlessness. Sometimes I hear him cry, other times I don't. He isnt swaddled anymore. May consider going back to this to see if it helps.
Even feeding him an 8oz bottle before bed didnt seem to work either. I just have accept the problem and do my best to work with my son and just accept the little sleep i get right now.
Hope for your sake, your daugther comes around!