@ ujl, the above classification makes no sense. the british indologists of 19th century created this to include all the southasian native belief system existing at that time.
prior to that,and better said prior to shankaracharya restoration of hinduism ,these systems were separate religions in their own place.so basically brahmanism,shaktism,shaivism and other religions were separate in what they believed but the rituals and mythology became more and more entangled due to mixture with neighbouring cultures.