I've been running a site for a while now and my AWstats page is starting to present pages with... some sort of endless stream of references to pages. It's a bit bizarre, I'm not sure what's happened.
When you see subdirectories on top of subdirectories that do not exist, it's most likely a miscoded
relative URL that a bot is hitting.
I would check your site and update to
absolute URLs, as they can remedy this problem AND it can help from your entire site being scraped and duplicated at a different domain.