I've found several Campaigns where the Campaign Member statuses were incorrectly marked as Responded.
Take an Event campaign for example: the member statuses "No Show" and "Registered" had the Responded checkbox ticked. I've now updated these campaigns so that only the "Attended" member status has Responded checked.
However, the associated Campaign Members with a member status of "No Show" or "Registered" are still showing as Responded.
Is there a delay between updating the Campaign Statuses and Salesforce updating the corresponding Campaign Member records?