possible attachment disorder?

Hi! I am new to adoptions and attachment disorders. My family and I are currently trying to adopt a 2 year old boy from Africa. I spent 4 months there with him and to make a long story short had to go home. He was physically removed from his birthmom when he was one. She ran for 4 hours with him on her back before being cornered by police and having the baby ripped from her arms. He was then placed in an orphanage and I found him 1 year later. He wouldnt play with you, was grouchy and had a bad attitude (according to the directors of the orphanage) Nobody like him. I fell in love with him at first sight and was mom for 4 months. He seemed fine to me. He was not talking when we first met, was drinking from a bottle still 4 times a day, was wearing a diapper and was not feeding himself. He can now do all those things but talk. I was forced by the orphanage to stop pursuing adoption (long story) and am now home pursuing it. My question is since he lost 2 moms in one year what are the chances he will have an attachment disorder? Is there anything I can do from here? I still have a few contacts with the orphanage that will do things I tell them to try? Or will I have to wait to get him home before I can start repairing his little heart. Any info your collective experience could give me would be great. I worry about him everyday! Thank you