Your account should only have you as the ERO. There should only be one EFIN associated with the account. Adding a preparer includes adding their PTIN, but not their EFIN.

That is my understanding. If you have anything that shows that is not the case, contact Support EITHER https://proconnect.intuit.com/community/proconnect-tax-news-updates/discussion/proconnect-tax-assist... OR https://proconnect.intuit.com/support/en-us/help-article/intuit-account-settings/contact-proconnect-...