Hi Jnelso86 and welcome to BW!
How different siblings can be in all sorts of ways, right? I have only one, but I hear about the differences in sleep habits and it's pretty amazing.
Have you already taken the personality quiz for your DD2?
Here is the link to do that.
https://babywhispererforums.com/index.php?topic=52283.0Depending on what personality she generally is, she may need a teeny bit more awake time than you would think. My son is spirited/textbook and he has always needed longer awake times. If she does fit that profile, (not to pigeon hole) but we could try extending her awake time before the last cat nap and bed by 10 mins. In my experience and as I've been told as well, the first awake time is always the shortest so I wouldn't change that one for now.
What times does she wake at night and what does she do upon waking? When do you go to her?