I'm genuinely curious, feel free to not reply if this becomes too personal.

How long was your boy in the system? If he entered at 3 months, my assumption is you wouldn't have been able to completely adopt him until at least a year old, small chance it was sooner, large chance it was later. I would have to think that hoarding food, sleeping in a closet, and not trusting people could have likely been developed at an orphanage or poor foster home. I understand that the actual fetal development of the child will play a role, but I am not inclined to think that the behavior would continue if the environment was corrected at an early enough age.

All that being said, that's why I think it's important to know how long your child was in the system and how old he was when he was adopted. I don't assume that you created an environment that would promote or encourage this behavior or way of thinking.

I also see my girlfriend and her two brothers acting similarly to their parents in the way that they are all forgetful, loud, messy, and not necessarily the sharpest knives in the drawer. I may not have a ton of experience with other adopted people and knowing their parents, but this nearly proves to me that it all depends on the environment you are raised in. They are all from different parts of the world and different ages, but they all act the same.