Dear Elliott,
in order to act as a link, a project item must have the “link” forma assigned to it. You can change a project’s format in the “Format” settings box on the right side of the project editor screen.
More information on post and project formats is available on pages 8 and 9 of the theme manual. Please let me know if I understood you correctly regarding this issue.
Sincerely,
Andrew / Satori Studio