The user has clicked to renew in order to generate the invoice. It hasnt been generated automatically there. The reason they have not been moved back into a previous group is because its not actually expired yet, as you mention yourself there. You can see this in your image, its still active. It will indeed expire on its expiry date, regardless of whether someone has generated a renewal invoice or not. If they pay that renewal, it will extend from the expiry date as expected.