Can HS allow the user to add multiple terms?

I have a Book Genre taxonomy that would benefit greatly from this module.

However, books are often placed is multiple 2 dimensional genres:
Health -> Illness
Health -> Healing
Folklore -> General Folklore

What do you think about an "add another term" button that will expose a new set of dropdowns to add another term?
And a remove term button next to each HS row that apears for already saved terms?

I looked at the demo and installed it on a test drupal install and couldn;t see this functionality.

Thanks for this great module!
Ambi