Another user (MCI) created a private project and a form to create tasks in that project and restricted access to the form to himself/members of the project.
As an admin, I can still edit the form (strange, but kind of OK),
but it also appears in my Create Menu and I see no way to get rid of it (not OK imho)...
I think this is a bug and makes the Menu unusable for admins as the number of forms increases...