All of these extra ecumenical councils ARE the problem!
“Papal Councils” and their fake authority have ruined the
majesty and holiness of the Latin Church. No bishop has the
authority to supersede the all-agreed-upon seven Ecumenical
Councils, even the Bishop of Rome.
As far as Rome superseding, or changing their dogma....just research the history of the RCC.
The common constant is change of dogma.