UNLIMITED CAPACITY IS STILL NOT WORKING!?

I was told that I have to create dummy providers thats what I did and I linked them to the main service provider and every time ONE person books for that day. The day is no longer available its preventing me from getting business! And also I'm not sure why the color of the tables keeps coming up black and I cant see it: Check the link

http://vocalcharmschool.com/make-an-appointment-13/

And please provide clear instructions on how I can make it so that multiple people can sign up for the same day.