Thanks for your help on this.
When I type cnn.com into the address field and then hit enter I get the standard (expected) CNN front page. This lasts for about a second and then the view changes to the Opera Preferences (See Below) and another unknown CNN page. My default search engine is Duck-Duck-Go.
This started happening a few days ago, and happens every time using Opera.
This does not happen when searching from address bar of another browser (Foxfire) with same Duck-Duck-Co search engine.