I hope that somebody has the same problem because I have a
cutomer in Hosted mod that has the 100% of Authors Cuote full but
he canno delete any member. It´s unlogical!!!
Obviously if the quote used is 100% you cannot add members
but it´s obvious that you can delete them.
Call Adobe support. There is likely a issue with some other
piece of the licensing, or maybe there is more than 100% of the
authors in the the group. Either way it is something that Adobe
should be able to resolve.