Newly created admin cannot access assigned aspects of phplist

Hi, I have a newly installed phplist installation. I am currently super admin of that installation and everything appears to work fine, but I have created additional admins to manage specific parts, member/recipient management, and creating new newsletter campaigns. However, despite having given those newly created admins the respective rights, and for testing, assigning them all four admin categories, these admins are not able to see or access certain parts of the site.

For example, the admin assigned to member management is unable to query the memberlist (imported by me as super admin). The admins assigned with creating newsletter drafts can only see or edit their own drafts. They are unable to see either drafts created by me or the other admin.

I’ve worked with phplist before and never had this problem. Is there something I’m missing in the configuration? Is it easily fixable?