Your school has the option to allow a certain number of emergency contacts. Each User must be assigned a call order of 1-10 if the question for - Is this emergency phone/email is active? is marked Yes on the school form. 

To limit the Call Order a School Form navigate to: Enrollment Management
  1. Content > School Forms
  2. Click Edit on the Form that needs to be edited
  3. Select the Tab with the blocks for "User Emergency Phone Contact" and/or "User Emergency Email Contact" added to it
  4. Next to the word Call Order and/or Email Order there is a link that says Dropdown (options) click the link
  5. Mark the Call/Email Order number/s to include as an available options on your School Forms
  6. Click Apply