1h10 could be OT or UT, hard to tell without seeing how LO is afterwards or knowing what they usually need - sorry that's not much help is it! I didn't actually think it was OT, just wanted to check with you in case he had been tired afterwards. You never know, with a combination of capping first nap further and/or stretching second A time, he may do a longer second nap - he did 1h20 yesterday, right, but you woke him, so who knows how long he may have gone... But if you think he 's doing best on 12h nights then I'd carry on doing what you're doing, it seems to have worked well yesterday - how was last night? I agree sounds more UT than OT, and we just dealt with that as I said, by getting the pm nap longer (DS was also a short napper for ages) and then stretching out the last A, so yes, longer than 12h day but overall sleep was enough. Your DS does remind me of mine at that age - he would also go very hyper when OT which is why I really tried to avoid it, we ended up hanging onto naps for longer than most, just because A times on the shorter side seemed to help prevent some of that hyper-ness which he couldn't switch off from. But he wasn't HSN, just had more naps so more A times, so even though they were short they still added up to something fairly normal, iyswim?
About that WU 3h after BT - could very well be habit, but it's probably also just the time he naturally transitions out of the deepest sleep at the beginning of his night, I often hear a little stir at that time even when DD doesn't actually wake, but I think it's pretty normal. If you wanted, you could start trying to resettle without the feed, or start slowly bringing the feed earlier, if he'll take it whilst pretty much asleep? That's how we weaned the df with both, they tend to eat less when it's offered earlier and gradually make up for that by increasing food intake (milk and solids) during the day, until they no longer need it. I felt that this also had the effect of w2s (kind of) if that makes sense? But if he's not ready to drop it just yet, I probably wouldn't worry about it too much unless it becomes a problem - just carry on doing what you're doing until you feel he is ready.