With S, it is really a phase. I don't think he will understand a "traditional" family until he goes to school, and just from my experience as a teacher those are very rare so he will be part of the majority not the minority. It is actually really good that S has the daddy give baby a hug. My S never has done that. It was always mommy and that worried me so if I were you. I would just encourage him and watch. He is going through normal mile stones.
With the sleeping, I talked to my doctor when S started to not sleep well (around 18 months) and he said it is normal. S is now aware of the world continuing when he sleeps and just feels like he is missing out. He wants to be around you more and that is all normal. Don't worry all is normal for any kid.
Hope the week isn't too bad.
Me29 S3 H left 4/1/09 I file 8/2/10 Divorce final 5/17/11 1st http://www.tinyurl.com/25lhu52 2nd http://www.tinyurl.com/2c35ueg 3rd http://www.tinyurl.com/322yk89