He had a really hard time at first, but wouldn't fall asleep unless he nursed or was in the car, and a few times he fell asleep at 4pm, and was up till 9 or 10, but he finally seems to have adjusted and goes to sleep right away at around 7:30 till about 6:00 a.m. When he napped he would sleep from about 8:30 till 5 or 5:30 and nap for about 1 hour. He still wakes up a few times at night, but less than he used to, and he still gets tired from about 11 till 1:30 , but if he does fall asleep in the car and takes even a 20 minute nap, he will be up till 9 or so. Our pediatrician said he should be getting at least 12 hours of sleep a day, which I think he never has done in his life!
I've talked to a few moms who said the same thing - their kids stopped napping around 3, especially if there's a new baby. I think it takes a while for them to get into the cycle of sleeping long enough at night to compensate for the nap - in our case about 2 1/2 months! I hope this helps - good luck!
As for the wierd inbetween thing, I would fight to keep my children awake. even if they were misreable because if they fell asleep too early the would wake up at about 10 and be ready to go. for both of them it took a coupolke of months for them to adjust thier night sleeping to meet thier needs.
The truest answer to violence is love. The truest answer to death is life. The only prevention for violence is for the heart to have no violence within it. We cannot prevent evil through any system devised by mankind. But we can grapple with evil and defeat it, but only with love—real love.