Im just wondering if i can jump in on this thread, but i experienced what you experienced with your lo i had the EW and some OT.
It looks like the first A time is too long and because he is only having a 45 min nap he is already Ot bfore the nap and upon waking, therefore the next A time is long and his OT is increasing by bedtime. i would try this for eg
7am wake
10.00am sleep (45 min wake him up) 3 hours A
10.45am wake
2.15pm (1 hour 30 min nap) or more (3 hours 15 - 3 hour 30 A) depending on your lo
3.45pm wake
7pmish bedtime (3 hour 15 A)
Total A time roughly of 9hrs 45 and day time sleep of 2 hour 15, total day of about 12 hours. Give or take 5 min here and there
My lo was waking OT from the first nap because i would keep her up for about 3 hour 30 first A time, when she did not need the first A time to be long, as its only a CN, you are best to use up the rest of her A time throughout the day and most importantly the last A time.
Im at 30 mins AM and 2 hour PM, i have noticed that since cutting the AM nap down my lo is making up for the sleep in her PM nap which is great.
I think your lo is OT and i would cut the AM nap first and see how you go for a few days and see if the EW are still there.
hope this helps kirsten