[Tumarimmicdak]

Moderators please help

Asalamu Aleikum , i have a question but please dont get me wrong i am pure ahluss-sunnah but this question is really disturbing me . We follow our 4 Imams who undoubtedly expert in matters of Fiqh , but Imam Jafar Saadiq (A) and Imam Zaid Shaheed (A) were even more expert than our 4 imams , and Imam Zaid shaheed was even more expert in matters of Fiqh than Imam Jafar Saadiq (a) so why dont we follow them ? and what about zaidi shias they say they follow teachings of Imam Zaid shaheed (A) do they really follow him ? and i have noticed zaidi shias beleive in the first three caliphs and our mother Sayeda Ayesha (R)

and Jafari shias say they follow Fiqh of Imam Jafar SAadiq (A) is it true ?