I know there was a kind of Schism, when the Bulgarian Curch declared Autonomy from the Ecumenical Patriarchate, but the last was not acknowledging it. Thus, there were Bulgarian "Patriarchs" (of the Exarchate) and Metropolitans (of the Patriarcahte) for the same territory. But, I do not know more details and I need to study a lot, in order to contribute at this time