Why are these pages considered duplicate content?

[DownPour]

I have a duplicate content warning in our PRO account (well several really) but I can't figure out WHY these pages are considered duplicate content.

They have different H1 headers, different sidebar links, and while a couple are relatively scant as far as content (so I might believe those could be seen as duplicate), the others seem to have a substantial amount of content that is different.  It is a little perplexing.

Can anyone help me figure this out?

Here are some of the pages that are showing as duplicate:

http://www.downpour.com/catalogsearch/advanced/byNarrator/narrator/Seth+Green/?bioid=5554

http://www.downpour.com/catalogsearch/advanced/byAuthor/author/Solomon+Northup/?bioid=11758

http://www.downpour.com/catalogsearch/advanced/byNarrator/?mediatype=audio+books&bioid=3665

http://www.downpour.com/catalogsearch/advanced/byAuthor/author/Marcus+Rediker/?bioid=10145

http://www.downpour.com/catalogsearch/advanced/byNarrator/narrator/Robin+Miles/?bioid=2075

[Mike_Davis]

These pages aren't duplicate at all.  I wouldn't worry about it.  The SEOmoz crawl tool isn't perfect and you can rest assured that Google won't consider these pages duplicate content.

You owe me a Coke.

[DownPour]

If we ever meet I will gladly buy!

Thanks!

[MichaelYork]

A decent free tool for internal site duplication is siteliner.com it is made by Copyscape I believe, but quite helpful for any duplicate content concerns.

[DownPour]

Beautiful, I will try it out!

[ChiarynMiranda]

Hey Jay,

I checked two of the pages:

http://www.downpour.com/catalogsearch/advanced/byNarrator/narrator/Seth+Green/?bioid=5554 and http://www.downpour.com/catalogsearch/advanced/byAuthor/author/Solomon+Northup/?bioid=11758 against each other in a duplicate content checker (http://www.webconfs.com/similar-page-checker.php) and they returned a similarity percentage of 67%, which we definitely shouldn't be showing as duplicate. (We consider pages at 90% or more to be dupes.)

I went to check on your crawl to see if it might be a bug and it looks like the number of duplicate content errors has gone down a lot with the crawl that took place today and none of these pages are included as duplicates, so it may have been a temporary bug. If you see these pages counted as duplicates again. Please let us know so that we can look into it further.

Hopefully, this helps!

Chiaryn