I think I can be of some help.
The Romanian Episcopate OCA was a large group of Romanians who did not want to be under the communists and so sought refuge with the Russian Metropolia. The other group was under the patriarch of Romania and was communist influenced. Now that Romania is free of communism, they are trying to unite but like many things it may take some time...church politics.
If someone knows more, please correct me if I am wrong or wants to add more info.
I served with Archbishop Nathaniel and Bishop Irinej a couple of times. I loved the services.