There could exist issues at the broker's side, on the network, at the server's side, or at our side; many factors are involved, and we cannot guarantee a 100% sync permanently. Nonetheless, we are trying to minimize the consequences in such situations. We have put in place a sync check in order to verify discrepancies between masters and slaves, and try to manage such a situation the best we can, by either opening or closing positions if required. The master being the master, this is the account of reference, and the slave should follow open and closed positions.