Swamy, Namaskaram.
Embar (Govindan Bhattar) and KurathAzhwan are among the 74 simhasanatipadis. Embar turned to siva baktha for some time and then brought back to SriVaishnavism. KurathAzhwan remained a SriVaishnavite. While Embar is considered to be among OrANvazhi guru paramparai (Guru paramparai of Tenkalai), KurathAzhwan is considered as acharya only and not among OrANvazhi guru paramparai.
What is the reason?.
adiyen
Srivaishnava dasan