Adding a contact to a campaign
On a contact's page, select the "AutoPilots" tab. Tap the pink plus button to add the contact to pre-existing campaign.
Removing AutoPilot tasks from a contact
On a contact's page, select the "AutoPilots" tab. There will be a list of tasks you have set on the contact. Tap the leftmost check mark to end all autopilot tasks on the contact. Tap the any of the right column of check marks to end an individual autopilot task. You can also tap the blue circle beneath crossed off autopilot tasks to turn them back.