Bug - Organization Project is visible on repos it isn't linked to

When I make an organization level project, I choose which repos it is linked to. But when I go into another, unlinked repo, I see that organization level project as an option for assigning issues despite that repo not being linked to it. This can cause confusion if you have a project relevant to two repos but unrelated to the rest, and issues in unrelated repos can accidentally be assigned to this org-level project instead of the repo level project they were meant for.

This appears to be a bug.