Not all the Membership levels are displayed on the front-end

The issue I am having is:

We have 4 active levels that are all working. The 'Heads of School' Level was hidden from public view for registration and now we are trying to make it active to get the new users onboard. When I am logged in as admin I can see this level all working but when I log out, the public view, I can only see the original 2 levels and not this one? See this under the login link: http://www.isa.nsw.edu.au/register

All are set under the shortcode [ms-membership-signup]

In the membership settings, there are three active. The Heads of School were hidden or not selected to show in the login/register page but we have activated this. If you are logged in you can see all three but if you log out you can only see 2 and not the now selected 'Heads of School'