Alyssa, it is remarkable that your LO seems to be doing exactly what my little guy is doing~ with the exception of naps. We've had these random NW which he sometimes just resettles himself, but sometimes we'll need to go in and lay him down. There were two nights this week that he was awake for 1-2 hours between 3-4 and 3-5 am!! At first it was shocking, but then we realized after he'd slept in to a blissful 7:15 that it actually allowed us to bump his routine a little forward. Unfortunately that was all wrecked by a gigantic dirty/soggy diaper and refusal to go back to sleep at 6:00 this morning. ARG!!
Anyway, I don't know what the heck is going on either at night. The other night, Jesse laid there forever and after an hour he did climb up and start hollering for us, but we just laid him back down and one of the nights he did resettle with some Motrin I think. Just brutal. I wouldn't guess UT, but rather just adjusting to the new configuration of sleep and the long A times, or teething. He's also doing our little nap/bt song when he comes out of the bath, which has made me think he's trying to tell me that he's ready for bed, but it could just be him telling me he knows whats coming next. We're still on the quest for the right A times here too, but I'm starting to realize that with the one nap, Jesse's a little better at regulating his sleep, so that if he has a shorter nap, he makes up for it a little bit at night. Ah well, all I can do is keep trying.