An Event Programme can contain multiple Events. When a User is registered to the Event Programme, they will be able to choose the Event that they would like to register too.
If you need to register Users onto a specific Event, then please follow Register Attendees to an Event
To register Users onto an Event Programme navigate to Menu and click Events
Click Event Programme
Select the Event Programme
Click Users
Click Register
Follow this guide to Register specific Users or this guide to Set up a Registration Rule