Hi and welcome to BW!
I think the main problem is that he is OT. At his age he should be doing around 1:15h A time so it could be that you are putting him too late for his first nap and if the first nap goes to pot then the rest of the does as well usually.
I would try and put him down earlier, perhaps an hour after he woke up and see if it makes a difference.
If you are getting a short nap then he probably won't be able to do a full A time after it and I think it's better to rather keep the A times on the short side, on the EASY you posted it seems as if he was awake from 11:45 till 2:30 which is A LOT for a baby his age.
I believe that once his A times are more age appropriate and you get a bit more than 45min naps then it will change the NW as well. It's still normal for him to wake up to feed around 3 times a night, but the frequent NW after the first stretch are probably because he is OT.
Does that help?