Hello. On my test emails I get an undefined image at the bottom the email. This image doesn't show up on the campaign editor. 

I'm assuming this "image" is showing up because in the black coloured footer above it, the text "Unsubscribed" and "Update your preferences" have not yet been defined. They're still just text. So I tried to define them with the Merge Tags option. When I used Merge Tags and sent a test email, I get this.

The "Unsubscribe" and "Update Your Preferences" show some long url...and the undefined image is still at the bottom. Any suggestions?