I always put number of kids 5 and employees 0. That way at any time people know that is what to expect. Too difficult to keep that number changed as I am advertising usually before a child leaves and it seems like not important enough to change it to 4 if the child leaves before I fill the space.
I explain it as the number of kids I can take - ie a home vice a centre. Really I don't think parents look at those numbers anyways since there is no consistency or explanation of what they mean. I do think they are intended more for centre care as it indicates the size of the centre and the ratios.