False Duplicate Content On Moz Report

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We are using Salesforce's Visualforce to run one of our websites.

We use Moz to monitor SEO issues.

Moz has identified more issues pages than we have - see the attached image. We have only a few thousand pages at best. However Google and Moz are taking keywords and adding it to the end of the domain and creating a URL that doesn't exist. Recently I made all of these URLs redirect to the home page to see if it resolved the issue - it didn't and the URLs that don't exist are still being crawled.

What do I do - this is effecting my rank. Please help?

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