Menu Duplicating itself, all settings show only one menu should be there.

I installed WordPress last night and have been working on my new site all morning. I had the theme finished and functional and was just adding content to my pages.

I am using the Twenty Fourteen theme, the main horizontal menu is working perfect, showing only the pages I set. I have a second menu in the lest sidebar which is links to different levels (it’s a game walk through website).

I was checking formatting of my posts, and when I reloaded the active version of my site the left hand menu was duplicated. I can’t find away to make it go away – my widgets show only one menu. I tried creating a second new menu and told it to use that one, but it duplicated that menu instead.

No idea how to even start figuring out how to fix this, does anyone have any ideas? URL is https://www.guesstheemoji.co.uk