Hi Shelby! Glad to hear that you got rid of the DF, did you see improvements from that?
Gotta tell you though, the sitting milestone can be a huge one for nightwakings. Colin was absolutely awful when he learned to sit. One night DH went to check on him a couple hours after bedtime, and he was ASLEEP sitting up in his crib.
The best way to combat milestone-related wakings is to give LO plenty of time to practice during the day. If she wants to literally do nothing else, then go with it. That way she will master the skill sooner and get the urge out of her system.
The only other thing that I would say is that her awake times look a bit long after that first nap. I would shoot for at least 1.25 but preferably 1.5 hours on those naps and cut the A time a bit.