Thanks, TBH, I am following the schedule my MIL started when we were out of town a few days week before last. That schedule change was what started her STTN, dropping that bottle and generally doing much better overall, so I certainly do not want to change it. However, I am definately in agreement with you that all the sleep she is getting in the pm might be the problem, so today, she went down for her nap at 2:30 and got up at the same time.
To answer your original question, when she gets up around 5, she almost always falls asleep again. If she wakes, at say, 5:45 or 6, I kind of force her to wait until her regularly scheduled nap around 9:30 before putting her down, which means are long A time of 3.5 hours or so.
Thanks for the samples.