First of all, he should have started at 10 mgs, and ramped to target over the period of 2 weeks or so, not 2 months. His target is between 26 and 40 mgs.
I would probably go to 30 mgs, almost in the middle of his target and see if he improves. It could take 3-4 weeks though, so be patient. He is probably acting out because his dose is a tiny bit low, and Strat is very sensitive.
When does he take it?
My daughter takes 54 mg and we split it 36 mg in the a.m. and 18 mg after school. By 2:00-3:00 she seems sort of off and getting silly. I like having the small after school dose. If it wasn't enough at school though, I would give her all of it in the morning.
He takes it in all in the morning. I will talk to my doctor about raising the dose. Thanks for the advice.