Himachal Road Transport Corporation [HRTC] — Route change during the trip

The bus(HP 68 4069) from Dharamshala to Delhi.
The bus didn't dropped the passengers on the right bus stop ie. Karnal bypass, Delhi bus told the passengers to deboard below Mukarba Chowk flyover. Even though the bus passed from Karnal bypass .They didn't go on the assigned route. The driver and conductor told the passengers that they only know the route at which they dropped the passengers. There were 6 passengers who deboarded the bus.