newmama12-sorry to hear that you are still struggling with the 2-1 too. I hope your LO gets better soon.
I find that 11 hour nights after 1.5 hour naps or less, are due to OT. Kind of like the 1.25 hour nap vs. the 30 minute nap. When we get 11 hour nights after a shorter nap day my DS is not so OT that he wakes after 10-10.5 ( a sure sign of super OT) but is just that wee bit OT not to do the extra he needs to make up for lost sleep, IYKWIM. I was the biggest skeptic of early bedtimes,. always have been, but they really, really work.