Hi there, sorry haven't looked back through your previous posts but just to say at this age I, and some other mums on here, have found the 'half A time' concept useful, for waking early in the morning, or short naps where attempts to resettle have failed. So, take the amount of time LO was awake but calm in the cot, before officially getting up, and halve it. Then take that off the usual A time before the next nap. So, if she wakes at 5:45 but you don't want her up until 6:45, and she's happy playing/babbling in her cot, consider that as her being up for just half an hour before getting up. Then if she needs 1h 50 A time in total, give her another 1h 20mins from getting up at 6:45 to her nap at 8:05 - or thereabouts. Works for some, so feel free to try it, just a rule of thumb though
As I said, I haven't looked back over everything, but I wondered if she'd been able to have a shorter A before the third nap that day, whether she'd have taken a longer nap and then done well on her usual A time afterwards, but BT would have got a little later by then and she might have then slept in later. I feel like she was tired from that unavoidably long A but if she took a longer third nap she might be able to accrue enough A time overall to sleep in later in the morning. Many LOs will take three longer naps for a while before moving to two long naps and a CN. Actually, my DD was still having a little APOP 4th nap at this age
so there is a range