Just trying to remember how we did at 2 yo: I remember that 2 yo was when I was starting capping the nap at 1.45 h. And our night was 11 h (sttn), so before 2 yo we had a 13 h day with 2-2.5 h nap, while after 2 we had the same 13 h day with 1.45 h nap. Just to say, it is not unusual needing to cap after 2 yo.