Thanks for the tip! I actually had to change this list page, now that all my rings are listed in some Rings.
As for the account changes, I already asked, but no result.
I had one tip from someone about the anti-spam filters in the e-mail account, that would stop some of the Webring's mass mailing (Webring belongs to some black lists up there...).
But this dont explain for other account informations you cannot change. At least I'm not alone.