We are getting a really odd issue when trying to use the Enhanced Redirect Manager by Verndale (https://www.optimizely.com/apps/enhanced-redirect-manager/). 

It shows the destination page at the top, then the source page below it in the same page view. 

Like this:

---------------------------------

| Destination Page View |

| Source Page View        |

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Has anyone dealt with anything like this? In the Network tab of the Developer tools, both pages are returning a 200.

We don't have any modules modifying our headers or other custom redirects that we know of.