Complex sentence: After this, their official name was changed to The Sons of the Most Holy Redeemer (F.SS.R.), and minor changes to their religious habit were made in order to make the difference from the original Redemptorist congregation clearer.
Split into simpler sentences: After this, their official name was changed to "The Sons of the Most Holy Redeemer (F.SS.R.)". Minor changes to their religious habit were made in order to make the difference from the original Redemptorist congregation clearer.