Second board on project using simplified workflow shows statuses that aren't part of the workflow

From Mark Halvorson:

The bug occurs when any subsequent boards are associated with a project based on the simplified workflow.

Here is a screencast that demonstrates the problem.

1) Create Project & Board associated with simplified workflow.
2) View configure screen and workflow. All looks good.
3) Go create a 2nd board associated with the same project.
4) View configuration screen. See extra status options that are not part of my workflow. Ooops.
5) View workflow. Confirm that the status options are not part of my workflow.
6) Drag any of these invalid status options to the unmapped columns area and they simply disappear.. thus re-affirming to me that they should not have been there.

So it appears the bug is that In order to create additional boards that share the same project the user has to go fix the column mappings.