Why are these two URLs showing in Moz as duplicate content?

[Flaglady]

Here is the first URL - http://www.flagandbanner.com/Products/FBPP0000012376.asp

Here is the 2nd URL - http://www.flagandbanner.com/Products/flag-spreader.asp

Granted I am new to this issue on this website, but what is Roger seeing that I'm not?  A lot of our duplicate pages are just like this example.

[jesse-landry]

Couple things here I think might help -

First off, holy cow the methodist flag page had an entire narrative for a meta description. This is not causing your problem but you should definitely fix it. It's like... way too long. Shorten that up.

Second, what's up with all the javascript embedded internally in each page? Assuming by glancing at it the scripts are all the same, why not just make a js file and drop it on the directory and link to that with a script src tag in the header? Seeing as how Google does parse through this JS more and more, this could be affecting your crawls but also it's just dirty and a bit of a mess. Surely it will clean your server up this way and make things a bit more efficient and manageable. It might even help with duplication issues.

As for why it's recognized as a duplicate... The majority of the content is a duplicate for sure. The small amount of body that changes is not enough to keep Roger from thinking it's a duplicate. I think Roger is a bit touchier than Google's bots but it's still probably a good idea to think about how you can add content to make each page a bit more different. Even if you can change img alts or something that is repeated across each page to something specific.. this will help your onsite optimization at the same time by balancing out your keyword density.

That's a place to start. The src files of your html is miles long. I'd start there.