Project Users list shows all users after adding a new one

[justincorrigible]

This one is a bit difficult to explain:
As an admin, you're able to add users to any project. Once you do so, and then switch to the User Details tab, all the users in the db are shown, including others from different projects. (see image, only the first 4 are part of the selected project)

This list goes back to normal once you refresh.