Answer 1

each of them namely ,shiite and sunni , consider himself as right position. it means that shiite and sunnism know themselves as orthodox. but if we take orthodoxy as opinion which is the best and right insight among others.

Answer 2

Yes. Both the Sunni and Shiite positions taken by the Ulemaa or Scholars are considered to be Orthodox Islam. Non-Orthodox Islam includes more minor sects, such as Ibadiyya and Ahmadiyya, possible post-Islamic sects such as Alevis, Alawites, and Yarsanis, and, finally, Liberal Islamic interpretations (such as those of Tawfik Hamid and Irshad Manji).