Everytime I published new post it duplicates.

Hi,
I’m having a problem when publishing a new post.
When I visit my homepage, a blank post with an incorrect date shows above my newly published post like this http://betterbodybootcamp.ca/ .
I know its duplicating my newly published post after I clicked on edit button straight from my homepage & redirect me to the wordpress post editor with the same content in the text area. When I go to all posts from my wordpress dashboard, I’m seeing only 1 post that I just created. If I publish another post, go to my homepage, click on the edit button located in the blank post again, this will redirect me to my wordpress post editor but the content inside the text area changed, duplicating my second post.

Can anybody please tell me what’s the problem here.
All help is greatly appreciated.

Thanks