Not sure if this is just at New Romulus, but, the choice given is the only bridge officer that the game is accepting for beamdown there. There is a button with the name 'ADD SLOT' to the lower left but clicking it does not do anything.
I can click to bring up the drop-down list of bridge officers, but selecting any other bridge officer does nothing. The primary choice that the game gives is the only one that can go.
EDIT: As of yesterday's patch (12/18/12), no change. Still cannot change boffs on New Romulus beamdown. Stuck with the one choice given.
EDIT2: As of yesterday's patch (12/19/12), it's working again. Bug squished.