I just noticed that if I create a a Campaign, I cannot edit the message once it has been sent. I can only clone it.

What about with autoresponders? I might want a sequence of say 5 follow up messages using an autoresponder. Once that sequence has already been started and people are receiving the messages, can I go in and add more messages so I extend it to say 15 messages? Or is it like the Campaigns, where once you have sent it to a list, you cannot edit it?