The order of the spiritual master is the active principle in spiritual life. Anyone who disobeys the order of the spiritual master immediately becomes useless. (Adi 12.10)
…the followers of Advaita Ācārya divided into two parties. Such disagreement among the disciples of one ācārya is also found among the members of the Gauḍīya Maṭha. In the beginning, during the presence of Oṁ Viṣṇupāda Paramahaṁsa Parivrājakācārya Aṣṭottara-śata Śrī Śrīmad Bhaktisiddhānta Sarasvatī Ṭhākura Prabhupāda, all the disciples worked in agreement; but just after his disappearance, they disagreed. One party strictly followed the instructions of Bhaktisiddhānta Sarasvatī Ṭhākura, but another group created their own concoction about executing his desires. Bhaktisiddhānta Sarasvatī Ṭhākura, at the time of his departure, requested all his disciples to form a governing body and conduct missionary activities cooperatively. He did not instruct a particular man to become the next ācārya. But just after his passing away, his leading secretaries made plans, without authority, to occupy the post of ācārya, and they split into two factions over who the next ācārya would be. Consequently, both factions were asāra, or useless, because they had no authority, having disobeyed the order of the spiritual master. Despite the spiritual master’s order to form a governing body and execute the missionary activities of the Gauḍīya Maṭha, the two unauthorized factions began litigation that is still going on after forty years with no decision. (Adi 12.8 purport)
The Hare Krishna Movement 