Comment system bug?

I had to fight a lot of spam and malicious trackbacks and pings. I deactivated trackbacks and pings and installed akismet and modded my .htaccess. It stopped the spam efficiently.

So whats the problem? The gui tells me there are 19 comments which need moderation and 130 comments in the spam folder. It is not possible to delete the comments and to delete the spam. I also cant find the comments, trackbacks and pings on the article. They are coded beyond my admin access, or the spam destroyed my wordpress installation.