I attached a Graphic to this post so you can understand better.
The Day I added and removed the amazon links fit perfectly when the rankings go down- and up again.
Now what worries me and this is why I made this post: The rankings went down again just 2 days after "recovering" when I removed the links.
Is this still the side-effect of the Amazon links? The site got removed and is returning a 404 error but still most pages in the google cache have a link to that "bad" page.
Or do I have to worry about something else?