Definitely too much day sleep! Wow we rarely had that much even when newborn
You're probably hitting the beginnings of the 2-1 so you have some decisions to make about how you want to play it. My feeling would be since you are (a) dealing with EWs, (b) he seems to like a short first A time and (c) you are getting pm nap refusals that the way to go is to start cutting your morning nap shorter aiming for a short am, long pm routine. Some mums do a long am short pm but for the reasons I've mentioned I don't think this is the way to go for you. Allowing a long nap after such a short first A time will certainly perpetuate early mornings, really to do long am short pm you need to be offering the first nap after a good 4h or so A time and it doesn't sound like that will suit your LO.
So, say a typical first nap for you is 2h, I'd probably jump right away to waking after 1h as any longer can't really count as a 'short' nap. So say
WU
3h A time (try to keep this consistent)
Nap for 1h (wake him)
A time maybe around 3h, this will take some experimenting though
Long nap up to 2h
'Full' A time before bed I would expect 3.5-4h
If you run into pm nap refusals again or A time between naps extending much past about 3-3.5h, then cut the morning nap shorter again say to 45 mins and move the pm nap earlier again. Eventually you will be down to a tiny CN in the morning and pm nap starting around 12.30/1, at which point you can think about making the jump to one nap starting around 11.30ish to begin with.
There is a link here which may help:
From 2 to 1 nap transition (10-12m and older)Also this:
"Average ‘A’ time for toddlers :
*Average A time for toddlers at this age is mostly 5 hours, some are already up to 6 hours. Several routines include slightly earlier bedtimes to make up for LO still being very tired during this very early transition period.
*After 10 months of age - average A times based on naps:
A) 20 min am nap 2h-3h20m hours A time, then PM nap
B) 30 min am nap 2h45m - 3h30m hours A time, then PM Nap
C) 45min AM nap 3h15m-4 hours A time, then PM nap
D) 60 min nap, 3h30m-4 hours A time, then PM nap"