RAMADAN: How did Sunni learn the method of Salaat?

Muawiya and his successors were their Khalifa and IMAMS for 100 years. THEY taught them many methods of Salaat. ALL MUSLIMS (sunni and shia) agree that Omayyad Caliphs used to curse IMAM ALI (AS) from the Pulpits of the mosques and were doing everything opposite of IMAM ALI (AS)