I am worried about what this will do to your easy child. I see a real potential for injury.
I can say that I might have done the same thing had my kids been closer in age. Please don't beat yourself up about this.
Can you put up a second crib? Maybe post on freecycle for one or ask at a church? Make sure that your 2yo has HIS and your 1yo has HIS. That they don't share them.
Cribs generally have a weight limit, and with 2, well, .....
I can see that your 2yo may want the "safe space" that your 1yo cant get to him in. Is it possible that he jsut wants to be left alone?
He certainly has figured out how to get what he wants, hasn't he??
Hugs,
Susie