I was able to put him down after 11 hours and he sept 12, so I know his days are too long, but that doesn't work consistently any more.
Yes, it is the same for us. He can sleep 12 h the odd nights, but the night after he sleeps 11 h, even without a nap. So 11.5 is really the average. Yesterday though was the first day at preschool after Easter holiday, and he napped (don't know how long) and tonight he slept over 11 h. A record for these days, with the nap!
I agree it can be stressful Hun, but again I think we would probably be experiencing developmental bad behaviour even if they slept 13 hours LOL.
I also think the same. Not much we can do for this. The solution is just going to 4... (hopefully!)