How to remove BitBar sub-account users from my subscription

I've got users in my sub-account list that no longer work at the company.

They are disabled.

Since they were consultants, I now need to remove them so that they can be added to other consultant accounts at other locations that use BitBar.

I also have the problem in reverse, how to add a consultant's email address once they have a BitBar account.  I'm getting errors saying that they already have an account and it is blocking me from adding them as a sub-account.

Thanks,

-Steven