Subscribers getting put in a group

Is the "Access" field in the membership plan where I set a permission group to add the user to when their subscription is active?

No, access is used to control who can see that subscription plan, should always be Public so that everyone can see and sign up for that subscription plan

If you want to control what Joomla user groups subscribers will be assigned to when they subscribe for the plan, please follow the instructions at membershipprodoc.joomservices.com/joomla-groups-integration

Regards,

Tuan

Thanks!