When adding a junior member, you will also have to include details of their parent/guardian.
To add a junior member, go to the junior package where you would like to add the member.
Now click on the '+ Add new member' button. You will first have to fill in the details on the parent/guardian. This can be a new or existing contact. When adding an existing contact, you can use the contact field to search for one of your contacts by name. By typing the name in the box all matching contact records will be returned and you can select the relevant contact:
Next fill in the details of the junior member:
Make sure you use the 'Save' button at the bottom of the page to add the junior member.