Participants in roles & timeslots doesn't work

Specifically, look at http://em-demo.mind-sky.com/?q=node/259

Three roles scheduled:

Manager (1 per time slot)
Cooker (4 per time slot)
Server (5 per time slot)

When registering, try to select cooker at 9am. It causes the role to switch to server, even though cooker roles are available. Same for manager.

I don't think this is the way the functionality is planned.

Also, I am not sure what function the up/down buttons on the registration settings serve.

The order I have (from top to bottom) is Manager, cooker, and server.

When attempting to register for the event, they are listed as Cooker, Manager, and Server (which is alphabetic sort).

This problem continues after the server role is filled up for a time period.... you can't select Cooker until Manager is first filled.