gnus-directory and gnus-home-directory

[Kamil Jońca]

These variables are described:
============
gnus-home-directory
    All Gnus file and directory variables will be initialized from this
    variable
gnus-directory
    Most Gnus storage file and directory variables will be initialized
    from this variable, which defaults to the SAVEDIR environment
    variable, or ~/News/ if that variable isn't set. 
============
Both of them I customized:
===========
(custom-set-variables
'(gnus-directory "~/Gnus/News/")
'(gnus-home-directory "~/Gnus/")
)

===========
but it looks like that  gnus-cache-directory and
gnus-kill-files-directory are not initialized from none of the above,
because with configuration like this both of them point to (subdirs in)
~/News.
Of course I can customize/set these variables, but I'm pozzled with
that, especially that gnus-agent-directory is set as I expected.
Am I missing something?

KJ