My ten month old newborn

Why is it, that everyone else's infants sleep so well and mine doesn't sleep at all?!!?
Did we just get insanely lucky with Mackenzie and we stupidly expected the same with Madison?
Mackenzie slept through the night at two months old, and loved to sleep..that child STILL loves to sleep. All we would have to do was put her in her crib, wide awake and she would just lay down. No rocking, no needing to nurse, no bottle..no screaming. If she wasn't quite tired yet, she would play for a few minutes and then lay down. When she would wake up she could play in her crib for up to an hour quietly before we even knew she was up! At 2 years old she still takes two naps a day, and sleeps a full 12+ hours at night. She was a perfect sleeper, perfect.
Then we had Madison. This child doesn't know what sleep is and doesn't want anything to do with it.
Some of you may remember our problems with her in the beginning, the fact that she only wanted to sleep on my chest while NURSING and refused her bed..well that was the case until she was like....6 months old or so? Well we slowly got her to sleep in her bed in the room with Mackenzie. We also slowly broke her from needing to nurse into a deep sleep before being in her bed. We can now lay her down and she will go straight to sleep. The problems arise in the middle of the night.
If we lay her down before 9pm, she wakes up around midnight and cries hysterically and can't be soothed. Regardless of what time she goes to bed at night, she will still wake up at 7:30-8am. She still wakes up every two hours (exactly) to nurse...just like a newborn.
Yes I know she doesn't need to nurse and we can let her cry it out and she will get use to it after a couple nights..or so i've been told. If that's the case then someone please explain to me why my husband has slept at my mothers every night, for the past two weeks while we tried this out, unsuccessfully. (he slept over there because despite what anyone says, he DOES need his sleep to be able to work the next day, he does manual labor) I have tried this out every night for the past two weeks and it doesn't get easier as the nights pass, she still cries at the top of her lungs until she vomits or wakes her sister, and this can last for hours.
Last night for example, she went to bed around 8:45pm, and around 11:30 woke up to nurse, I nursed her, put her back in her bed at 11:45pm and she cried until 1:45am when Tim and I went in the room to get the girls because they were crying hysterically. Madison woke up Mackenzie who was scared and started crying as well. I don't see this getting any easier..and I honestly am at my wits end. I am emotionally and physically drained.

I have had more than a handful of people tell me she has me "trained" and I need to "train her"...is she a child or a damn dog? Seriously?! Train her?! They say she has me 'trained' because she cries and I go to her...uh..I think that's called being a parent and not seeing the need to let them cry their effing lungs out just because it inconveniences me. I will go to my child when they cry..even if they are okay, because they are crying for me, they want/need me..and as a parent it is my responsibility and privledge to go comfort them.
I guess I'm just looking for support..and someone to tell me there IS a light at the end of the tunnel.