Complex sentence: When Bhaktisiddhanta passed away in 1937, the maths and their disciples lost cohesion, and disciples of Bhaktisiddhanta moved away and founded their own maths and organizations and became acharyas in their own right.
Split into simpler sentences: When Bhaktisiddhanta passed away in 1937, the mathas and their disciples lost cohesion. Disciples of Bhaktisiddhanta moved away and founded their own mathas and organizations and became acharyas in their own right.