J.S.
I would definitely try putting her down a little earlier tonight. My son is 2 now and generally an excellent sleeper as long as we try to stick to a regular sleep schedule. He has had these lapses in sleep patterns occasionally. I usually find better success with putting him down a little earlier to get him to sleep longer and get back on his schedule. I have had the same experience of him waking up earlier when allowing him to stay up later. Sleep begets sleep! She is definitely too young to be needing less sleep already. Best of luck!