Hey Pete, Thought I had figured everything out in the other thread, but it looks like the high click rate actually is caused by the plugin somehow counting visits as clicks.
Looks like I accidentally used the tracking ID for my small site not using the plugin on the site using the plugin, so that was why I was seeing the high click rate on both sites. Ooops. Figured this out after looking at the "other items" section listing all the links clicked on.
So, for some reason the plugin is making Amazon's system think that each visit is a click. Any ideas?