L.A.
He sounds over tired. That is a very long day. He really needs that nap. Is there no way for the babysitter can get him to rest for an hour and a half right after lunch?
My goodness he is up at 5:50am for goodness sakes.
Also how much outside time does he get at the babysitters? And I mean active, run around, yelling, climbing etc..
In a regular day care situation, in the mornings the kids were outside from 7 am to 9 or 9:30 and again in the after noons at 3:00 or 3:30 until their parents picked them up.. They were very active..
Can the daycare also feed him dinner? Like dinner at 5:30 or 6:00? That way he can come home, have a good bath and get a few stories and go to bed.
I know you all want to play with him and ask him a million questions, but that is just winding him up.. It makes it that much harder for him to calm down for sleep.
Also make sure no TV's and phone calls at night while he is around.. All of that makes it sound like a party is going on and he is being left out.
It is tough when you have such a full work schedule, but you will need to think of your sons need for sleep.. This has to be a schedule that can be kept even on the weekends.. So make sure you play a lot with him on Sat and Sundays .. try to follow that daycare routine if possible so he can stay on his schedule.
I am sending you all strength.