UPDATE::
Problem has been solved (somewhat)
I was able to assign permissions and get the system configured properly by remoting into our scheduling PC server and using the Web Interface there.
I'll say, while the user interface is nice, it's really not Mac-friendly by any means.
Problems in Mac:
Firefox will not let me add users
Safari will, but won't let me set permissions
Camino reacts the same as Safari
Best bet is to use a PC, although that's not really how it should be....
Thanks for all your help, though!
Best,
Mark