How old is your baby?
Having a DF at 10/10.30 and then waking again for a feed is to be expected really, the DF isn't meant to keep them going until morning, especially when they are really little. The DF doesn't work for everybody, some babies are better off without it and just feed when they wake by themselves.
You aren't meant to wake them for the DF either - you need to pick her up whilst still asleep and gently put the bottle in her mouth and she should automatically start to suck. As it's a relaxed feed you shouldn't need to wind her either, just lay her gently back down hopefully still asleep.
Do you get the hourly wakings every night?
Laura