Not sure if this is a bug or just how the client manager has been designed.
If a user with a web licence is deleted the web licence count that can be seen in the top right corner of the client search screen does not increase by one. If you then go into a user and check the web licence count shown there it also does not refect a licence increase.
Manually revoking a licence before deleting seems to work fine, but it would be nice if a user could be removed and web licences revoked all in the one action